The bottom of the foot acne may be caused by a variety of reasons, but the most common is due to skin infections, including bacterial, fungal, viral infections, and in a few cases can also be caused by endocrine disorders, but this cause acne more often appear in the face and chest and back, the bottom of the foot is rare. In addition, it may also be related to frostbite, mosquito bites, etc., need to pay attention to the identification. 1, bacterial infection: the sole of the foot skin by bacterial infection, can form folliculitis, eczema or local sebaceous gland inflammation, and thus have acne performance, can apply antibacterial drugs or ultraviolet radiation for sterilization treatment; 2, fungal infection: the sole of the local skin by fungal infection can lead to tinea pedis, generally common in the feet wet sweaty, poor hygiene conditions In addition, some patients with pernicious anemia, diabetes or malignant tumors are also prone to fungal growth and tinea pedis. This can be treated with antifungal medication after a clear diagnosis; 3. Viral infections: Some viral infections such as plantar warts and syphilis can also cause pimple-like papules on the soles of the feet. The situation, but rarely seen; 5, frostbite: in the cold conditions of winter foot pimples may be frostbite, mostly accompanied by itching. If you have frostbite, you need to pay attention to the location of the sore to keep it warm, and it will usually heal itself when the weather turns warm. If the symptoms are more serious, you can go to the hospital to seek medical help, medication or physical therapy; 6, mosquito bites: foot pimples may also be due to mosquito bites to form the shape of a local papular urticaria similar to acne mistaken for acne, treatment can be applied to mint stove glycerine lotion, mint cream and glucocorticoid cream for itching and anti-inflammatory.