White adherence in the armpit may be related to axillary lichen planus, and the reasons for its formation include germs infection, environment, poor hygiene habits and so on. 1. Germs infection: common germs include Corynebacterium ciliatum, Corynebacterium microsporum, etc. If germs infect the armpits, ringworm of armpit hair may appear. 2. Environmental factors: If you live in a hot and humid environment for a long time, it may lead to localized sweating, which may trigger tinea cruris. 3. Poor hygienic habits: assuming daily inattention to personal hygiene, local cleaning is not in place, leading to the growth of rod-shaped bacilli, which may aggravate ringworm of the armpit hairs. White adherents in the armpits may be caused by ringworm of the armpit hairs, and it is recommended that the patient consults a doctor about the matter.