Small children sweating hair is very stinky to consider is not pay attention to hygiene, stinky sweating, ringworm and so on. 1. Do not pay attention to hygiene: children’s metabolism is relatively fast, so it is easy to sweat, if you do not pay attention to personal hygiene, do not wash your hair in a timely manner, the sweat and bacteria will have a chemical reaction, there is a foul odor. 2. smelly sweating: smelly sweating is divided into top secretion sweat gland smelly sweating, exocrine sweat gland smelly sweating, and local bacterial decomposition, organic substances release fatty acids have a relationship, a special odor. Generally in the hot summer symptoms are heavier. 3. Tinea capitis: Tinea capitis is a skin disease caused by fungal infection, common in children, most of them are caused by infection, the more common is tinea cruris, there will be tinea cruris scabs, tinea cruris scabs thicker parts are easy to secondary infections, often accompanied by a foul odor. Children sweating hair is very smelly there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.