The smell of armpit hair is mainly due to axillary hyperhidrosis, hygiene, dietary factors.
1. Axillary hyperhidrosis: its exact pathogenesis is not clear, may be related to genetic factors, external factors, dietary factors, etc., manifested as more sweat in the armpit, and accompanied by a special pungent odor. The symptoms will be aggravated by strenuous exercise and stress, and the clothes in the armpits may be dyed yellow, resulting in a long-lasting odor.
2. Hygiene: if strenuous exercise, in a hot environment, resulting in a lot of sweating, or long-term non-bath, no change of clothes, etc., may lead to sweat and skin surface microbial interaction, resulting in the production of short-chain fatty acids and ammonia and the emergence of odor.
3. Dietary factors: some patients may excrete smelly sweat after consuming foods with irritating odor such as garlic or raw onion.
The smell of armpit hair may also be caused by other factors, such as armpit hair ringworm, folliculitis, it is recommended that after excluding hygiene and dietary factors, timely medical treatment, standardized treatment under the guidance of the doctor.