Pus from blisters on the feet may be caused by tinea pedis, palmoplantar pustulosis, impetigo and so on. 1. Tinea pedis: when the dermatophytes invade the foot such as intermetatarsal, heel and other parts of the foot, it can be due to the skin sweating, water immersion occurs impregnated vesicular tinea pedis, impregnated parts can have blisters, whitening of the skin, the epidermis is easy to peel off, exposing the moist surface and oozing, generally have obvious itching, bacterial infection of the foot pus flow, odor. 2. Palmoplantar pustulosis: small pustules on the basis of erythema may appear on the palm or plantar of the foot, pustules may gradually rupture, crusting, desquamation, and new pustules may appear under the scales, which will not be cured for a long time. 3. Impetigo: purulent inflammation of the skin caused by type B hemolytic streptococcus and staphylococcus aureus, small papules, can be changed into a pustule with a red halo around it, the blister wall is thin and easy to break, vesiculation, and drying of a thick scab formation. The foot blisters pus recommended timely medical treatment, the doctor to clarify the cause of the disease, give targeted treatment.