Alum foot soak is mainly used for its anti-sweat, astringent and antiseptic effects. Alum has an astringent effect on the skin and can reduce the secretion of sweat, so alum foot soaks are more suitable for patients with sweaty feet and often sweaty feet prone to ringworm prophylactically. Alum foot soak generally uses 10-15g of alum dipped in warm water, and then soak your feet after all the alum has melted in the water. It is generally recommended to use it for 15-20 minutes and keep soaking it once a night for 5-6 days for a course of treatment, so that the symptoms of sweaty feet can be significantly improved. It should be noted that alum for foot soaking when the skin allergy prone people, the elderly and children need to be used with caution.