Socks with yellow color may be related to the weather, pollution, sweating, but also may be infection caused by tinea pedis. If it is caused by infection, it is recommended that the patient go to the hospital in time for treatment of the cause. Socks with yellow color may be related to weather and sweating. High humidity in the weather, mold on the socks lead to mold and turn yellow. Or hot weather leads to sweating a lot, because sweat contains urea, so the feet sweat sweat on the socks will be yellowish. It is also possible that an infection with fungus, bacteria, etc. causes the feet to develop tinea pedis. When the blisters of blister-type tinea pedis break, it leads to yellow marks on the socks. It is also usually accompanied by peeling, rough and dry skin or moist vesicles, and itching. It can be treated with medications such as clotrimazole, econazole, miconazole and ketoconazole. If physiological factors are excluded or accompanied by other abnormal symptoms, it is recommended to consult a hospital in time and use medication under the guidance of a doctor.