What is folliculitis?
Signs of folliculitis
Folliculitis is often confused with acne because the two conditions have similar appearances. However, there are some differences.
Signs of folliculitis include:
Causes of folliculitis
There are two types of folliculitis: superficial folliculitis, which affects the upper part of the follicle and the skin around it; and deep folliculitis, which affects the entire hair follicle deep into the skin.
As bacteria spreads, superficial folliculitis can develop into deep folliculitis and then into abscesses (a collection of pus in tissues).
Types and causes of folliculitis include:
This is an infection in the follicle caused by Staphylococcus aureus bacteria. It is the most common form of folliculitis.
Hot tub folliculitis
This is an infection caused by Pseudomonas aeruginosa bacteria. Hot tub folliculitis usually occurs after exposure to poorly treated pool or hot tub water. This type of folliculitis will usually clear up without treatment in a few days.
Known as pseudofolliculitis barbae, this form is caused by shaving too close to the skin. Hairs can turn back toward the skin and become ingrown. This condition mostly occurs in beard areas of men with curly hair, but it can also appear anywhere that is shaved.
Pseudofolliculitis barbae can develop into deep folliculitis called sycosis barbae. This is a severe form of shaving-related inflammation where the follicle becomes deeply infected. It may cause scarring.
This form of folliculitis is caused by prolonged antibiotic use. Over time, bacteria become resistant to treatment, which results in a worsening infection.
This type of folliculitis is found in people with compromised immune systems. If your immune system isn’t fully functioning because of HIV, chemotherapy, or other medical treatments, eosinophilic folliculitis may develop. It is an itchy rash that often appears on the shoulders, upper arms, neck, and forehead.
Boils and carbuncles
When to see the doctor for folliculitis
Some forms of folliculitis, like hot tub folliculitis, usually clear up within a few days on their own without treatment. However, you should seek medical advice if the folliculitis:
- Becomes hard and painful lumps
- Is widespread
- Doesn’t go away after a few days
- Starts to drain
Diagnosis of folliculitis
Your doctor will record your symptoms and your personal and medical history, including recent pool or hot tub exposure, long-term antibiotic use, and more. They may also examine your skin and test a sample of fluid or tissue to determine the type of folliculitis.
Treatments for folliculitis
Most types of folliculitis are not serious and can be treated at home. Home treatment can include:
- Using antibacterial wash to clean the skin and help clear bacteria
- Washing the scalp and beard with medicated shampoo
- Applying anti-itch cream to relieve discomfort
- Using warm compresses to relieve inflammation and pain
- Wearing loose clothing and changing immediately out of sweaty clothes
Hot tub folliculitis will usually disappear on its own without treatment.
For shaving-related folliculitis, treatment can also include:
- Shaving every other day or twice a week instead of daily
- Shaving with the grain of hair instead of against it
- Using an electric razor instead of a disposable blade
- Using shaving gel or cream instead of dry shaving
If your skin doesn’t respond to treatment or your condition is moderate to severe, your doctor may prescribe:
Infections left untreated may result in serious or deep infections that may spread or cause permanent scarring.
Skin Problems and Treatments Resources
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Cochrane Database of Systematic Reviews: "Interventions for bacterial folliculitis and boils (furuncles and carbuncles)."
Dermato-Endocrinology: "Special types of folliculitis which should be differentiated from acne."
Michigan Medicine: "Folliculitis."
Winters, R. and Mitchell, M. StatPearls, StatPearls Publishing, 2020.