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Scalp Pimples and Acne: Causes, Symptoms, and Treatment

Writer: Dr. Baraa Alnahhal
Dr. Baraa Alnahhal
Oct 7
8 min read

Updated: 2 days ago

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026

Quick Answer: What is scalp acne?

Scalp acne is a skin condition with breakouts of whiteheads, papules or cysts on the hair-bearing part of the head, caused by clogged hair follicles from sebum, sweat, dead skin cells and hair products. It is more common in adults than teens. Oil-free hair care and regular washing often help, and persistent cases may need antibiotics or antifungal shampoos. [1]

Diagram of the causes of scalp acne around a hair follicle: clogged follicles with dead skin cells, product buildup from gel and sprays, sweat and sebum, and microorganisms such as Cutibacterium acnes and Malassezia yeast. – rinnit.com
Scalp acne can result from clogged follicles, product buildup, sweat and sebum, and microorganisms.

What the research says

  • Benzoyl peroxide works better than placebo, but it can irritate. In a Cochrane review of 120 trials (29,592 randomized participants, mostly with acne on the face or trunk), participants were more likely to report improvement with benzoyl peroxide than with placebo or no treatment (risk ratio 1.27, 95% CI 1.12 to 1.45; low-certainty evidence). People were also about twice as likely to stop treatment because of side effects such as redness, itching, and burning (risk ratio 2.13) (Yang et al., Cochrane Database Syst Rev, 2020). [2]

  • Oral isotretinoin is the most effective option for severe acne. A network meta-analysis of 179 randomized trials (about 35,000 observations) found that for moderate-to-severe acne, oral isotretinoin at a total course dose of 120 mg/kg or more cut total lesion counts by an average of 58% more than placebo. For mild-to-moderate acne, a combined retinoid and benzoyl peroxide product was the most effective topical option (26% greater reduction) (Mavranezouli et al., Br J Dermatol, 2022). [3]

  • Some scalp “acne” is really a yeast folliculitis. A review reported that Malassezia folliculitis affects 1% to 17% of people worldwide, can be hard to tell apart from acne vulgaris, and needs proper testing so that the right antifungal treatment can be started (Henning et al., Ugeskr Laeger, 2020). [4]

What is scalp acne?

Scalp acne, often called scalp pimples, happens when the hair follicles on the head become blocked. Follicles are the canals through which hair grows, and when they are clogged by debris or oils, inflammation and breakouts follow. Pimples are a symptom of acne, and you can have an occasional breakout without having acne. Acne itself is a condition that can be short term or long term. [1]

Acne is most often linked with the face, chest, and back, and pimples on the scalp are less common. Acne affects nearly 80% of people between the ages of 11 and 30, but scalp acne is not limited to one age group and is more common in adults. The pimples can be itchy or painful, and they sometimes form clusters that make brushing or washing your hair uncomfortable. For a broader overview, see our complete guide to acne. [1]

What are the symptoms of scalp acne, and how severe can it be?

Breakouts can appear along the hairline or deeper in the hair-bearing areas of the scalp. Symptoms include pimples on the scalp or hairline, pus-filled whiteheads, inflamed or swollen bumps (acne papules), deep pus-filled cysts, and pain, soreness, or itching. Recognizing the type of lesion is the first step in choosing a treatment. [1]

Severity

Common Symptoms

Potential Complications

Mild

Occasional whiteheads and small red bumps.

Minor itchiness and localized redness.

Moderate

Clusters of inflamed papules and itchy pustules.

Persistent soreness and increased sensitivity.

Severe

Deep pus-filled cysts and painful nodules.

Scabbing, scarring, and hair loss.

Cross-section illustrations of common scalp lesions around hair follicles: whiteheads, inflamed papules, and deep cysts. – rinnit.com
Common scalp lesions range from whiteheads to inflamed papules and deep cysts.

What causes scalp pimples and acne, and who is at risk?

The main cause of scalp pimples and acne is clogged hair follicles on the scalp. They can become clogged because of: [1]

  • A buildup of hair products such as shampoo, hair gel, or hairspray. [1]

  • Fungus or other microorganisms, including bacteria, yeast, or mites. [1]

  • Sweat, oil, or dead skin cells. [1]

  • Too much or too little sebum, the oily substance that protects the skin. [1]

Other contributors include changing hormone levels, friction from hats, helmets, or headbands, stress, a genetic tendency, and a reaction to certain medicines. You may be at higher risk if you often wear hats, helmets, or headgear, use oil-based hair products, or work around greasy products, such as near a kitchen fryer. [1]

Conditions that can look like scalp acne

Pimples on the scalp can also be a sign of another condition, so it is worth having them checked if they do not improve. Examples include: [1]

Breakouts at the back of the hairline and neck can also be acne keloidalis nuchae.

Which shampoos and active ingredients help treat scalp acne?

Managing scalp acne often means switching to hair products that clear the follicles without adding oil. Many effective shampoos contain active ingredients that target a specific cause, such as fungus or bacteria. [1]

Active Ingredient

Primary Function

Best For

Salicylic Acid

Exfoliates dead skin cells.

Clogged pores and whiteheads.

Benzoyl Peroxide

Kills acne-causing bacteria.

Inflamed papules and pustules.

Ketoconazole or Ciclopirox

Antifungal agents.

Breakouts linked to yeast or fungus.

Selenium Sulfide

Anti-dandruff agent that reduces oil and flaking.

Seborrheic-related scalp problems.

Antibacterial soaps and oil-free products can also help. Use one product at a time unless your provider tells you otherwise, and check with them before combining treatments. [1]

How is scalp acne treated professionally?

Scalp acne that does not improve with home care and over-the-counter shampoos can be treated by a provider with stronger prescription options. Options for persistent, moderate, or severe cases include: [1]

  • Topical or oral antibiotics to clear bacteria from the hair follicles. [1] [5]

  • Topical steroids to treat folliculitis. [1] [5]

  • Oral isotretinoin for long-term scalp acne. It can cause severe birth defects, so anyone who could become pregnant must avoid pregnancy and follow the iPLEDGE program while taking it. [1] [5]

  • Oral antihistamines to reduce itching. [1] [5]

Do not pop or scratch the pimples. It can cause more pimples, infection, pain, and scarring (see our guide to acne scars). Talk to your provider about side effects before starting any medicine, and tell them about every supplement and medicine you take. [1]

Infographic of a scalp care and prevention routine: daily gentle wash, oil-free and non-comedogenic products, clean headwear, and managing stress. – rinnit.com
A simple routine: wash gently, use oil-free products, keep headwear clean, and manage stress.

How can scalp acne be prevented with good scalp hygiene?

Preventing scalp acne focuses on keeping hair follicles clean, such as washing hair when greasy, choosing oil-free products and regularly washing hats and pillowcases. [1]

  • Wash your hair daily or whenever it gets greasy, especially after exercising or sweating. [1]

  • Choose hair products labeled oil-free, noncomedogenic, or non-acnegenic. [1]

  • Wash hats, helmets, headbands, and pillowcases regularly so product residue does not transfer back to your skin. Choose well-fitted helmets with ventilation. [1]

  • Manage stress and eat a healthy, balanced diet. [1]

  • Keep a daily log of the hair products you use and how your scalp reacts to them. [1]

When to see a provider

Contact your healthcare provider if your acne gets worse, your skin does not improve after six weeks, or you have severe pain, swelling, or a fever. [1]

Conclusion

Scalp acne is a manageable condition. By finding the specific triggers and using the right products or medicines, many people see their scalp clear within about six weeks of starting treatment. If symptoms persist or cause significant pain, a dermatologist can help you protect your scalp and prevent long-term complications.

What are the next steps if you have scalp pimples or acne?

If you have persistent scalp breakouts that do not respond to over-the-counter treatment, make an appointment with a healthcare professional. A personalized plan can help you feel comfortable and confident again while protecting your hair.

Frequently Asked Questions

Scalp acne is a condition in which hair follicles on the head become clogged, leading to pimples or cysts. [1]

Yes. Acne is most common between the ages of 11 and 30, but scalp acne is not limited to one age group and is more common in adults. [1]

Clogged follicles from oil, sweat, dead skin cells, hair product buildup, or microorganisms such as bacteria, yeast, and mites. Hormones, friction, stress, genetics, and some medicines can also play a part. [1]

Yes. A buildup of products such as shampoo, gel, or hairspray, and oil-based products, can clog follicles. [1]

Scalp pimples can be itchy and painful, especially when inflamed or in clusters. [1]

No. Popping can cause more pimples, scarring, and infection. [1]

Options include shampoos with salicylic acid, benzoyl peroxide, antifungals such as ketoconazole or ciclopirox, or selenium sulfide, as well as antibacterial soaps and oil-free products. The best choice depends on the cause, so ask your provider. [1]

Yes. Sweat, oil, and dead skin cells can clog follicles, so wash your hair after you exercise or sweat. [1]

Severe scalp acne can cause hair loss or scabbing around the pimples. [1]

Once the cause is found and treatment starts, it can take up to six weeks for all the pimples to clear. You may notice less itching and fewer new pimples within a few days. [1]

Friction from hats, helmets, and headbands can contribute to breakouts. Avoid tight headwear and choose well-fitted, ventilated helmets. [1]

No. Acne is not contagious.

Yes. Stress is one of the factors that can contribute to scalp acne, so managing stress can help. [1]

Try not to scratch, because it can cause pimples to break open, leak, or bleed. A provider may recommend oral antihistamines or a topical steroid. [1] [5]

See a provider if the acne gets worse, does not improve after six weeks, or comes with severe pain, swelling, or a fever. [1]

Related Reading

Acne: Complete Guide to Symptoms, Causes, Diagnosis, and Treatment explains how acne forms and which treatments work best.

Tinea Capitis: Symptoms, Causes, Treatment and Prevention explains a fungal scalp infection that can cause bumps and hair loss.

References

  1. Cleveland Clinic. Scalp Pimples and Acne. Cleveland Clinic. October 30, 2022. https://my.clevelandclinic.org/health/diseases/24397-scalp-pimples-acne

  2. Yang Z, Zhang Y, Lazic Mosler E, et al. Topical benzoyl peroxide for acne. Cochrane Database Syst Rev. 2020;3(3):CD011154. PMID 32175593. https://doi.org/10.1002/14651858.CD011154.pub2

  3. Mavranezouli I, Daly CH, Welton NJ, et al. A systematic review and network meta-analysis of topical pharmacological, oral pharmacological, physical and combined treatments for acne vulgaris. Br J Dermatol. 2022;187(5):639-649. PMID 35789996. https://doi.org/10.1111/bjd.21739

  4. Henning MA, Jemec GB, Saunte DM. [Malassezia folliculitis]. Ugeskr Laeger. 2020;182(47):V08200572. PMID 33215579. https://pubmed.ncbi.nlm.nih.gov/33215579/

  5. DermNet New Zealand. Scalp folliculitis. DermNet. Accessed October 7, 2026. https://dermnetnz.org/topics/scalp-folliculitis

Medical Disclaimer

This article is for informational purposes only and does not constitute medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.

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