Folliculitis is caused by an infection of the hair follicles by bacteria, viruses or fungi. The most common cause of folliculitis is Staphylococcus aureus bacteria.

Follicles are densest on your scalp, but they occur everywhere on your body except your palms, soles and mucous membranes, such as your lips. If follicles become damaged, they become susceptible to invasion.

The most common causes of follicle damage include:

  • Friction from shaving or tight clothing
  • Excessive perspiration
  • Inflammatory skin conditions, including dermatitis and acne
  • Injuries to your skin, such as abrasions or surgical wounds
  • Coverings on your skin, such as plastic dressings or adhesive tape
Oct. 06, 2011

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