Skin bumps

Skin bumps are one of the most common reasons people seek help from a dermatologist. In everyday language, people use words such as bumps, pimples and spots to describe raised skin lesions, red rashes, pus-filled spots, lumps under the skin or itchy eruptions. Medically, skin bumps are not a single diagnosis. They may be caused by acne, folliculitis, hives, contact dermatitis, rosacea, perioral dermatitis, milia, keratosis pilaris, a boil, an insect bite or another skin condition.

The most important questions are what the bumps look like, where they are, how long they last, whether they hurt, itch, contain pus or recur, and whether they leave scars or pigmentation. These details help determine whether gentle skin care and suitable pharmacy products may be enough or whether a dermatologist consultation and targeted treatment are needed.

What are skin bumps?

Skin bumps are raised areas that can be seen or felt. They may be small or large, red or skin-coloured, superficial or deep, with or without pus, itchy, burning or painful.

Dermatologists describe these lesions more precisely:

Skin bumps are a sign, not a diagnosis. To treat them correctly, their cause must first be understood.

Are skin bumps and acne the same thing?

Not always. Acne is one of the most common causes of skin bumps, especially in teenagers and young adults, but not all bumps are acne.

Acne is characterised by comedones: blackheads and whiteheads. They form when the opening of a hair follicle becomes blocked with sebum, or skin oil, and dead skin cells. Inflammation may lead to papules, pustules, deep nodules and cyst-like lesions.

If the skin has only red bumps without blackheads or whiteheads, particularly if they itch, burn, occur only around the mouth or appear after shaving, using a new cosmetic product or taking a medicine, the cause may not be acne. Folliculitis, rosacea, perioral dermatitis, contact dermatitis, hives or another condition should be considered.

Common types of skin bumps

Comedones: blackheads and whiteheads

Comedones are non-inflammatory acne lesions. Blackheads are not dirt: the contents of the blocked pore darken when exposed to air and oxidised. Whiteheads are closed comedones in which the follicle opening is not open.

Papules and pustules

Papules are small, firm raised skin lesions. Inflammatory papules may be red, tender or painful, without a visible pus-filled head. Pustules are bumps with a white or yellowish pus-filled head. They may be a sign of acne or folliculitis.

Deep nodules and cyst-like lesions

Deep inflammatory nodules and cyst-like lesions are often painful. They carry a greater risk of scarring and usually require treatment by a dermatologist. If deep, painful bumps recur or do not resolve, you should not wait for months before seeking help.

Itchy bumps

Itchy bumps are often not typical acne. They may be caused by hives, contact dermatitis, insect bites, scabies, folliculitis or another skin reaction. If lesions appear and disappear quickly in different places, particularly with intense itching, hives are one possible cause.

Why do skin bumps develop?

Skin bumps have many causes. In some people, the main factors are sebaceous gland activity and blocked pores; in others, they include shaving, cosmetics, medicines, friction, sweating, hormonal changes, infection or a chronic skin condition.

Several interconnected processes contribute to acne:

• the sebaceous glands produce more sebum;
• dead skin cells accumulate and block the hair follicle;
• the environment within the follicle and the activity of the skin microbiome bacterium Cutibacterium acnes change;
• inflammation is activated.

Cutibacterium acnes is part of the normal skin microbiome, and acne is not contagious.

Acne may be worsened by hormonal changes, the menstrual cycle, polycystic ovary syndrome, certain medicines, comedogenic cosmetics, friction, skin occlusion from tight clothing or oily products, stress and, in some patients, dietary factors. However, acne does not develop because someone is not clean enough. Excessive washing and scrubbing usually make the situation worse.

Where do skin bumps most commonly appear?

The location of skin bumps may help identify a possible cause, but location alone is not enough to establish a diagnosis.

Skin bumps on the face

Facial bumps are often related to acne, but rosacea, perioral dermatitis, contact dermatitis, milia, seborrhoeic dermatitis or medicine-induced rashes may also affect the face.

Illustration of different acne lesions on the face: comedones, red inflammatory papules and a few pustules.

Blackheads, whiteheads, red inflammatory bumps and pustules in oilier areas of the face are more suggestive of acne. Persistent facial redness, warmth, burning, visible blood vessels and red bumps without comedones are more suggestive of rosacea. Perioral dermatitis is one possible cause when small bumps and redness are concentrated around the mouth, nose or eyes, especially after using topical corticosteroids or thick, oily creams.

Does the location of facial bumps reveal internal organ disease?

Online face maps often link forehead bumps to the intestines, nose bumps to the liver and cheek bumps to the lungs. This is not a reliable, evidence-based diagnostic method.

The location of bumps can provide practical clues about skin care, friction, cosmetics, shaving, hair care products or hormonal influences, but internal organ disease cannot be diagnosed from the location of a bump alone.

These factors are practical clues, not proof of a particular cause. Recurrent bumps in one area do not mean that toxins are leaving the body. Local skin factors, hormonal influences, an inflammatory skin condition or irritation are more likely explanations.

Skin bumps on the chin, forehead and jawline

Patients often associate bumps on the chin and jawline with hormones. In some women, acne does worsen before menstruation or is related to androgen activity. If bumps occur together with irregular periods, increased body or facial hair, or thinning scalp hair, a medical assessment is needed because polycystic ovary syndrome is one possible cause. The location of the bumps alone does not confirm this diagnosis.

Hair oils, thick hair care products, hats, helmets, sweating and friction may contribute to forehead bumps. If the lesions are very uniform and itchy, especially on the forehead, back or chest, Malassezia folliculitis should also be considered. It is sometimes mistaken for acne.

Skin bumps on the back, chest and shoulders

The back, chest and shoulders have many sebaceous glands, so acne is common in these areas. Sweating, tight sportswear, friction from backpacks, body oils and unsuitable cosmetic products may worsen the bumps.

Illustration of acne on the upper back and shoulders. The appearance and distribution of lesions vary from person to person.

Back acne is often harder to manage with facial skin care products alone because the affected area may be larger and products are more difficult to apply. If there are many painful, pus-filled or deep bumps, a dermatologist consultation is especially important to reduce the risk of scarring.

Bumps on the chest and upper chest may be acne, folliculitis, irritation from sweat and friction, contact dermatitis caused by laundry detergent or cosmetics, or ingrown hairs. Under the breasts or around a bra, heat, moisture, tight underwear and fabric friction often worsen skin irritation.

A painful lump, marked redness, hot skin, pus or fever in the chest or upper chest area requires medical advice. A lump within the breast itself must also be assessed by a doctor.

Deep, painful and pus-filled skin bumps

A bump under the skin may be a deep acne nodule, a cyst-like lesion, a boil or an abscess. These lesions are often painful because the inflammation lies deeper in the skin and puts pressure on surrounding tissues.

Pus consists mainly of immune cells, tissue fluid and cellular debris. The presence of pus alone does not mean that antibiotics are needed or that the bump can be squeezed. Do not squeeze deep, very painful bumps, especially in the central part of the face, near the nose or eyes, or bumps with extensive redness and swelling.

See a doctor if a bump becomes larger and more painful, the surrounding skin is hot and red, fever or significant pus develops, the bumps recur or they leave scars.

Acne or another skin condition?

Not all red eruptions are acne. Different conditions can look similar but require different treatment.

From left to right: facial redness and papules seen in rosacea, bumps around the mouth associated with perioral dermatitis, and raised wheals typical of hives. These illustrations are not a substitute for medical assessment.

If the diagnosis is unclear, it is better not to experiment with strong products. Acne preparations may irritate skin affected by perioral dermatitis or rosacea, while corticosteroid creams may worsen acne, rosacea and perioral dermatitis.

Skin bumps in children and teenagers

In teenagers, bumps are often acne because androgen effects on the sebaceous glands increase during puberty. Teenage acne should not be regarded as merely a cosmetic problem. It can cause scarring and pigmentation and significantly affect self-esteem, social life and emotional well-being.

In children, bumps may have other causes, including infection, atopic dermatitis, contact dermatitis, insect bites, viral rashes, milia or other conditions. Unexplained rashes in infants and young children should be assessed by a doctor, especially if they are widespread, painful, pus-filled or associated with fever.

If a child suddenly develops itchy bumps that change location, hives are one possible cause. Other rashes may be associated with a viral infection, an allergic reaction or insect bites. Parents should assess not only the rash but also the child's overall condition: temperature, drowsiness, eating and drinking, breathing, vomiting, pain and other symptoms. A child's rash should not be diagnosed solely from an online image.

Do not give a child adult acne products without medical advice, particularly prescription retinoids, antibiotics or strongly irritating preparations. Treatment must be selected according to the child's age and diagnosis. A paediatric dermatologist can help with unexplained or recurrent skin problems.

Skin bumps in adults

In adults, bumps may be acne, but they may also be rosacea, perioral dermatitis, folliculitis, medicine-induced eruptions or contact dermatitis. Adult acne can persist, recur and affect the chin, jawline, neck, back or chest.

In women, adult acne may worsen before menstruation, during pregnancy, after a change in hormonal contraception or in association with hormonal disorders. If acne starts suddenly, is severe or occurs together with menstrual changes, increased body or facial hair, or thinning scalp hair, medical advice is needed.

Do diet, stress and hormones affect skin bumps?

Hormonal influences

Hormones are one of the main factors in acne. Androgens stimulate the sebaceous glands, which is why acne is so common during puberty. The menstrual cycle, pregnancy and certain hormonal conditions can also affect the development of pimples.

Stress

Stress is not the only cause of acne, but it can worsen existing acne, encourage touching or picking the skin and disturb sleep. Improving sleep and daily habits may help well-being, but does not replace necessary treatment.

Diet

The effects of diet differ between individuals. In some patients, acne may be associated with a high-glycaemic-index diet or certain dairy products, but there is no basis for claiming that chocolate or fatty foods always cause pimples. The evidence is insufficient to recommend one specific acne diet for everyone. Strict dietary restrictions without a clear reason are not recommended, particularly for children and teenagers.

How should you care for skin with bumps?

Skin care should be simple, consistent and gentle. Too many products, harsh scrubs, alcohol-based solutions and aggressive cleansing often irritate the skin and worsen inflammation.

A basic skin care routine

• Gentle cleansing. Wash the skin 1–2 times a day with a gentle, non-abrasive cleanser. After heavy sweating, the skin can be gently rinsed or cleansed.
• Moisturising. Choose a light, non-comedogenic moisturiser, especially when using acne products that dry the skin.
• Sun protection. During the day, use a suitable broad-spectrum sunscreen with SPF 30 or higher. Sun exposure can worsen post-inflammatory pigmentation.
• Suitable cosmetics. Choose non-comedogenic products and gently remove make-up in the evening.
• Patience. The first changes with acne treatment often become noticeable after 6–8 weeks, while the results of an initial treatment course are usually assessed after about 12 weeks.

Products for mild acne

Products containing benzoyl peroxide, salicylic acid or azelaic acid may help mild acne. Introduce them gradually and use them as directed, because they can irritate and dry the skin. Do not start several new active products at the same time.

If you are pregnant or breastfeeding, have sensitive skin or rosacea, or the diagnosis is unclear, consult a doctor or pharmacist before using active products. Retinoids must not be used during pregnancy or when planning a pregnancy.

What should you avoid if you have skin bumps?

• Do not squeeze, puncture or scratch bumps, especially deep, painful or inflamed lesions.
• Do not rub the skin with harsh scrubs or abrasive brushes.
• Do not use toothpaste, lemon juice, baking soda, alcohol or other irritating home remedies.
• Do not start many active skin care products at the same time.
• Do not use antibiotics, prescription retinoids or isotretinoin without medical advice.
• Do not use corticosteroid creams on the face unless instructed by a doctor, as they may worsen acne, rosacea and perioral dermatitis.

How are skin bumps and acne treated?

Treatment depends on the diagnosis. If the bumps are acne, a dermatologist assesses its severity, the type and location of lesions, the risk of scarring, age, pregnancy or breastfeeding, previously used products and the patient's daily habits.

Acne treatment options

Treatment often involves a combination of products. Antibiotics are not suitable for all skin bumps, and using them without medical advice contributes to antibiotic resistance.

If the bumps are not acne

Depending on its cause, folliculitis may require antiseptics, topical or systemic antibiotics, antifungal treatment or measures to reduce irritation. Rosacea treatment aims to reduce inflammation and redness. Perioral dermatitis often requires changes to skin care and avoidance of triggering creams; if potent corticosteroids have been used on the face for a long time, discuss a withdrawal plan with a doctor. Contact dermatitis requires identification and avoidance of the irritant or allergen.

When should you consult a dermatologist?

It is advisable to see a dermatologist if:

• the bumps are deep, painful, contain significant pus or recur;
• mild acne has not improved after 6–8 weeks of gentle care and suitable products;
• scars or persistent dark marks develop;
• the rash is widespread or the diagnosis is unclear;
• the bumps significantly affect self-esteem or day-to-day well-being;
• a rash appears after starting a new medicine;
• a child has an unexplained or widespread rash;
• you are pregnant or breastfeeding and need suitable treatment;
• previously tried products do not help or cause marked irritation.

If scars or deep nodules develop, or the condition worsens, there is no need to wait several weeks. At a dermatologist consultation, the doctor can help identify the cause and choose a treatment plan.

When should you seek emergency help?

Signs that require an immediate call to 113 or 112

• A rash occurs together with swelling of the tongue or throat, shortness of breath, wheezing, severe dizziness or fainting.
• Widespread blisters, peeling skin, painful mucosal lesions or rapid deterioration in well-being develop after taking a medicine.
• Red or purple spots do not fade when pressed with a clear glass, especially with fever, marked drowsiness, headache, vomiting or feeling unwell.

A non-blanching rash in a child may be petechiae or other bleeding into the skin. If it appears suddenly and the cause is unclear, contact emergency services immediately. The glass test must not delay seeking help; the absence of a rash or a rash that fades under pressure does not rule out a serious illness if the child appears severely unwell.

When is an urgent medical assessment needed?

An urgent medical assessment is needed if redness, pain or swelling increases rapidly, the skin becomes hot, or fever, chills, marked weakness or red streaks on the skin develop. Painful redness and swelling near the eye, especially with changes in vision, also require urgent assessment. If the condition deteriorates rapidly or is severe, call 113 or 112.

A new rash after taking a medicine should be discussed with a doctor, but breathing difficulties, mucosal lesions or skin peeling require immediate help.

How can you reduce the risk of scarring and pigmentation?

Scars are more likely after deep inflammatory acne, nodules, cyst-like lesions, boils and squeezing skin lesions. Dark or pink marks after bumps are not the same as scars, but they can also persist for a long time.

• Do not squeeze or scratch bumps.
• Treat deep and inflammatory acne promptly.
• Avoid aggressive scrubs and irritating home remedies.
• Use a sunscreen suitable for your skin.
• Follow the treatment plan for long enough and discuss it with a doctor when necessary.

Conditions that can look like skin bumps

Folliculitis

Folliculitis is inflammation of a hair follicle. It may be caused by bacteria, fungi, viruses or irritation. It often looks like small pus-filled bumps around hairs and may occur after shaving, sweating, wearing tight clothing or using an inadequately disinfected hot tub.

Rosacea

Rosacea is a chronic facial skin condition involving redness, burning, warmth, visible blood vessels and sometimes red bumps or pustules. It more commonly affects the central part of the face and usually does not cause comedones.

Perioral dermatitis

Perioral dermatitis causes small bumps and redness around the mouth. Similar lesions may also occur around the nose or eyes. Topical corticosteroid creams, thick facial creams or irritating products can trigger it.

Hives, or urticaria

Hives cause itchy, raised lesions that may change shape and location. An individual wheal usually disappears within 24 hours, although new ones may appear elsewhere. Hives are not always a sign of allergy. Read more in the Medart article Acute urticaria (hives).

Contact dermatitis

Contact dermatitis develops when the skin reacts to an irritant or allergen, such as cosmetics, perfume, hair dye, nickel, adhesive, disinfectants or cleaning products. It may cause itching, redness, small bumps, blisters, dryness and scaling.

Hidradenitis suppurativa

The condition hidradenitis suppurativa may cause painful nodules, abscesses and recurrent inflammation in the armpits, groin, under the breasts or around the buttocks. It should not be regarded as ordinary pimples or simply ingrown hairs. Recurrent lesions in these areas need assessment by a dermatologist.

Common myths about skin bumps

Summary

Skin bumps are a very common complaint with many possible causes. They may be acne, but they may also be folliculitis, rosacea, perioral dermatitis, hives, contact dermatitis, infection or another skin condition. Appropriate care starts with assessing the type of bumps: whether there are comedones, pus, pain, itching, deep nodules, changing lesions or a relationship with shaving, cosmetics, medicines or hormonal changes.

Gentle skin care, non-comedogenic products and suitable pharmacy preparations may sometimes help mild acne. However, deep, painful, markedly pus-filled, recurrent or scar-forming bumps should not be managed solely with home remedies. A dermatologist can help establish an accurate diagnosis and choose treatment that reduces inflammation, the risk of scarring and the condition's impact on everyday life.

Medical disclaimer

This information is for educational purposes. It does not replace a dermatologist consultation, diagnosis or treatment. Consult a doctor if bumps are painful, deep, markedly pus-filled, recurrent, persistent, leave scars, spread rapidly, occur in a child, appear after taking a medicine or significantly affect well-being. Seek emergency medical help for severe or rapidly worsening symptoms.

References and authoritative sources

• American Academy of Dermatology (AAD): clinical guidelines for acne treatment
• National Institute for Health and Care Excellence (NICE): acne assessment and management guideline NG198
• DermNet: acne features, types and treatment
• DermNet: folliculitis causes, clinical features and treatment
• DermNet: rosacea features, diagnosis and treatment
• DermNet: perioral and periorificial dermatitis, causes and treatment
• DermNet: urticaria (hives), types, features and treatment
• DermNet: keratosis pilaris
• DermNet: hidradenitis suppurativa, features, diagnosis and treatment
• National Health Service (NHS): patient information on acne
• Mayo Clinic: acne symptoms, causes and risk factors

Content author

Dermatologist Dr. med. Dace Buile