Girls with sour feet odor may be related to factors such as not paying attention to cleanliness and athlete’s foot. 1. Pay no attention to hygiene: when girls wear thicker shoes, poor breathability, or pay no attention to hygiene and do not often wash their feet, change shoes and socks, etc., may cause the feet have a sour odor. 2. Tinea pedis: Tinea pedis is a common skin disease caused by fungal infection of the skin of the feet, the main manifestations of tinea pedis are peeling, blisters, rough and dry skin, itching, foot odor, etc., the girl’s feet have a sour odor may be caused by tinea pedis. It is recommended that the patient timely medical examination, clear cause for targeted treatment, pay attention to personal hygiene in life, try to wear the right size, dry and loose breathable shoes and socks.