Ingrown toenails are most common in bunions, where the soft tissue next to the nail is embedded due to the curved growth of the toenail, causing redness and pain in the soft tissue next to the nail edge after wearing shoes and squeezing or after sports, and pus and abnormal fluid oozing. As the skin is broken, in a moist and sweaty environment inside the shoe, bacteria invade the wound causing infectious inflammation and nail infection is very likely to occur. Prevention 1. Pay attention to the choice of shoes. To choose a slightly loose fitting low heel shoes to reduce the squeeze and friction on the bunion. 2. Pay attention to the way you cut your toenails. The edge of the nail should be slightly longer than the edge of the skin. The more pain some people have the shorter their toenails are trimmed is not right. 3, pay attention to keep the feet dry and clean. 4. Wear cotton socks that absorb sweat well and keep the feet dry. Recurring ingrown toenails must be seen by a doctor to find the cause and actively treat it. Treatment First of all, reduce sports and wear loose shoes to reduce friction between the toenail and the skin to reduce further stimulation; secondly, pay attention to the cleanliness of the toe to avoid dust and other dirt; also change socks regularly to keep the toe dry and reduce the breeding of bacteria; you can soak your feet with 1:5,000 potassium permanganate solution every day and also apply disinfectant to the red and swollen edges of the toenail to keep it dry. If the redness and pain are still not relieved, you must go to the hospital as soon as possible. If an abscess is found to have formed, you must cut and drain it as soon as possible and use antibiotics under the guidance of a doctor. If the treatment is not timely, the lesion may develop into a perinail abscess, a sub nail abscess or even toe bone osteomyelitis if the lesion is severe.