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Trichomycosis is a bacterial infection affecting the underarm hair. In rare instances, the infection can also affect the pubic hair. The condition is not dangerous but can trigger discomfort and irritation.

What are the indications?

Trichomycosis does not generally trigger any symptoms and might be missed.

Nevertheless, there are some signs to watch out for:

  • Yellow, reddened or black sweat
  • Sweaty and foul armpits
  • Small yellow, red or black nodules on the hair shaft
    Trichomycosis can be treated and typically clears in a few weeks with proper care and good hygiene.
  • Sweat stains on clothes
  • Thick armpit hair
  • Hair loss from the destroyed hair shafts and excess bacteria

The condition is not contagious. Nevertheless, it is best to seek medical care if any symptoms are present.

Management of trichomycosis

Trichomycosis can be treated and typically clears in a few weeks with proper care and good hygiene. Before any treatment method is started, it is important to shave the hair in the affected site.


Once a diagnosis of trichomycosis is given, the doctor will prescribe topical antibiotics such as clindamycin or erythromycin lotion. It must be applied at least 2 times a day for up to 2 weeks.

In some cases, benzoyl peroxide lotion or gel can be used but it can trigger skin irritation.

If the topical antibiotics fail to work, the doctor might prescribe an oral variant of erythromycin. It must be taken daily for up to 2 weeks.

In case the symptoms persist or do not clear up, a doctor must be seen for further testing and other suitable treatment options.

Proper hygiene must also be observed such as:

  • Washing the site daily with water and soap
  • An antiperspirant can be used to lessen the sweating and buildup of bacteria
  • Apply talc-free drying products to reduce the moisture
  • Thoroughly wash and dry clothes after using them

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