Folliculitis, caused by bacterial or fungal infections, is inflammation of your hair follicles. It presents as bumps or a rash on your skin anywhere hair grows, including the scalp, torso, arms ...

Superficial folliculitis is an inflammation of the upper section of the hair follicle, and may be caused by an injury to the follicle, by infection, or by a chemical irritation of the follicle.

This causes small bumps in the skin. Folliculitis is caused by infection (bacterial, viral or fungal), or damage to the hair follicles due to other reasons such as shaving or skin irritation.