Sweat bumps on the legs are considered to be a high probability of keratosis pilaris. Keratosis pilaris has a genetic predisposition and usually occurs on the extensor side of the limbs, and in severe cases, the rash may also appear on the back as well as the cheeks, manifesting as follicular pimples with keratinized surfaces. Treatment can be given locally as vitamin A acid cream, adapalene gel, tazarotene gel, etc., a small amount of topical application once in the evening, and at the same time must pay attention to skin moisturizing, avoid excessive washing, can be checked in the hospital for vitamin A blood concentration, at the same time can be combined with vitamin A orally, and must be in the monitoring of the blood concentration of the oral medication, which can help to alleviate the symptoms. Usually pay attention to eat more fresh vegetables, fruits, animal liver, lean meat and fresh orange fruits can help reduce symptoms.