Result of a hair transplant after 15 days
April 7th 2026

Pimples on the head: why do they appear and how to treat them?

Sometimes acne not only manifests itself on the face or body, but we can even have pimples on the head. When they appear, it is important to know what to do and how to act, since although it is usually acne, it can be a symptom of a more complex disease.

At the blog de Hospital Capilar, clinic dedicated to hair grafting in Madrid, Murcia and Pontevedra, we tell you everything you need to know about pimples on the head: Why do they appear, what types are there and how to treat them?

What are pimples on the head?

When we talk about pimples on the head, most of the time we refer to acne on the scalp. It is true that the face is usually the most common area where acne appears, but we must not forget that the scalp is also skin, so it can also be affected.

The pimples on the head usually present with certain discomforts, since the scalp tends to become inflamed in the areas where acne appears, causing pain, itching and irritation

Causes of acne on the scalp

Normally the causes of acne on the scalp are similar to when we get pimples on our face. However, the factor that triggers pimples on the head depends precisely on the type of pimple in question.

Folliculitis

Folliculitis of the scalp is an inflammation or infection of the hair follicles, commonly caused by the bacteria Staphylococcus aureus, fungi, sweat, oil, or irritation after shaving. It manifests as pimples, itching, and redness, and can be superficial, with small pustules, or deep, affecting the hair bulb and potentially causing scarring alopecia.

Allergic reactions

An intolerance or an allergic reaction can be the cause of pimples on the head. Normally it usually occurs in case of eating food or with certain drugs.

Bacterial infection

Another reason why we can suffer from acne on the scalp is due to a bacterial infection. Specifically, it is the bacteria proprionibacterium acne that causes pimples on the head.

Hormonal changes

In the same way that happens with acne on the face and body, sudden hormonal changes at certain stages of development, such as puberty or pregnancy, can cause acne on the head.

Environment/Atmosphere

Sudden changes in weather can affect the health of the scalp with the development of acne.

Stress

Same as him stress causes hair loss, can also be the main cause of acne on the scalp. Experiencing strong episodes of stress or anxiety usually has a direct impact on our hair health. 

Hair Redensification Treatment en Hospital Capilar

Symptom

Identifying the symptoms of scalp folliculitis early is key to preventing complications and protecting hair health. The most common signs include:

  • Red bumps in the affected area: small inflamed bumps around the hair follicles.
  • Pustules or pimples with pus: pimples with a white or yellowish tip that indicate an active bacterial infection.
  • Intense itching: constant itching that can worsen inflammation if scratched.
  • Pain when touching the scalp: sensitivity or pain when brushing or touching the affected area.
  • Sensation of heat or local inflammation: the inflamed area may be warmer due to the immune response.
  • Hair loss in the affected areas: In severe cases, inflammation can damage the follicle and lead to localized hair loss.

 

If the pimples are very painful, persist for more than 2 weeks, spread, or cause hair loss, it is advisable to see a dermatologist for proper diagnosis and treatment.

Types of pimples on the scalp

The pimples that appear on the head are not all the same, and depending on the type and cause that originates it, it is recommended to follow one treatment or another. Thus, acne in this area can be classified as follows.

pimples with pus

If the pimples on the head are accompanied by pus, it is an obvious symptom of a infection of viral, fungal or bacterial origin. This occurs when there is also an excess of sebum that plugs the hair follicles causing itching and some discomfort.

grains with fat

Although it may seem the same, pimples with pus and pimples with fat they are not the same. Sebaceous, or fatty, are identified by a yellowish lump, unlike those containing pus that are white.

This type of pimples on the head usually occurs when there is a lack of hygiene. It is important to treat them early, otherwise an infection could develop.

red beans

On the other hand, there are the red grains. They are typical in allergic reactions, so in these cases it is important to see a specialist.

Dry beans

Dry pimples are caused by a seborrheic dermatitis and they look similar to scabs.

Discover hair products endorsed by experts to keep your scalp in top condition.

Treatment for pimples on the head

Depending on the type and origin of acne on the scalp, one treatment or another will be recommended. It is important to go to a specialist to receive a diagnosis and put the most suitable solution in each case.

Among the most common treatments for pimples on the head are topical cream and oral antibiotics, retinoids, as well as other types of compounds such as benzoyl peroxide, salicylic acid and sulfur. 

Shampoos and topical treatments

The shampoos and topical treatments They help control bacteria, fungi, and excess oil on the scalp:

  • Ketoconazole: Antifungal shampoo that fights fungi and reduces flaking and irritation.
  • Salicylic acid: Exfoliating scrub that cleanses follicles and removes dead cells and excess sebum.
  • Sulfur: With antibacterial and keratolytic properties, it helps reduce inflammation and pimples.

Medical treatments

Some treatments require medical prescription and professional supervision:

  • Oral or topical antibiotics for serious bacterial infections.
  • Retinoids to regulate sebum production and promote scalp renewal.

How to prevent scalp pimples

Keep a proper hair hygiene This is essential to prevent scalp breakouts. To reduce their occurrence, it is recommended to:

  • Do not scratch or squeeze pimples to prevent infection and scarring.
  • Keep your hair dry after sweating or showering.
  • Wash your hair frequently to remove sebum, sweat, dead cells, and product residue.
  • Avoid harsh commercial finishing products, such as lacquers, gels, or sprays containing alcohol, which can irritate the skin and clog follicles.
  • Reduce the use of hats, helmets, or any constant friction, as this can cause irritation and promote the appearance of pimples.
  • Wash combs and brushes regularly, as they accumulate sweat, oil, and bacteria that can be transferred to the scalp.
  • Use scalp-friendly shampoos with a neutral pH (around 5,5), which cleanse deeply without disrupting the skin's natural balance.

 

Adopting these habits as part of your daily routine helps maintain a clean, balanced, and healthy scalp, significantly reducing the risk of pimples and other irritations.

Your hair health in the hands of experts

En Hospital Capilar We know that a good hair care routine is the best preventative medicine. Discover the shampoos and hair products recommended by specialists in our online store and take care of your hair. Visit the shop now! Hospital Capilar.

REQUEST YOUR FREE MEDICAL EVALUATION

By submitting the form you accept the Privacy Policy

?