The tendency to scratch spots is greatest on the forearms, face and scalp. Most patients have oily skins. Most patients seek advice because of the itch. This may have lead their doctors to suspect scabies or other mite infestations. The itch tends to come in episodes, accompanied by a stinging sensation.
Some patients notice the itch is worse after sweat-inducing exercise or after a hot shower.
When scratched, the spots may display a local hive-like reaction with a surrounding red flare. In these conditions an overgrowth of the same pityrosporum yeast is believed to be involved. Patients may also have true acne accompanying the pityrosporum folliculitis. This is not surprising because increased skin oil also encourages acne but in this case there is an overgrowth of the normal skin bacteria rather than yeasts. If you have pityrosporum folliculitis, see your doctor or dermatologist for advice.