Nail fungus is an inflammatory reaction involving the skin folds around the nail, manifesting as acute or chronic purulent, tenderness and painful swelling of the perinail tissue, caused by abscesses in the nail folds. The fingers are more commonly involved than the toes. Pathogenesis: The main susceptibility factor is injury resulting in separation of the nail epithelium from the nail plate, and secondary invasion of the moist nail grooves and nail folds by purulent cocci or yeasts. The common pathogenic bacteria are Staphylococcus aureus, Streptococcus pyogenes, Pseudomonas, Aspergillus, or anaerobic bacteria; the most common pathogenic yeast is Candida albicans. Clinical manifestations: Initially, it only shows redness, swelling and pain in the subcutaneous tissue on one side of the finger (toe) nail, and a small part of it will subside on its own, but some will rapidly become pus, and the pus will spread to the subcutaneous root of the finger (toe) nail and the opposite nail groove along the side of the nail groove, forming a semi-ring-shaped abscess, which eventually leads to local swelling and strong pain, and the pain will increase when the hand drops, and the pain often affects rest at night. In severe cases, it can also lead to systemic infection with high fever and chills, and can recur. Treatment: 1. Antibiotics or anti-inflammatory and analgesic agents can be taken orally, intravenously or used topically. 2.Iodine application and soaking When trauma or breakage of the toe occurs, use iodine to rub or soak the affected toe until the skin turns white to prevent nail infection. 3.Surgical nail extraction and incision and drainage Depending on the condition, abscess incision and drainage, nail extraction and drainage, or radical nail fungus treatment can be performed. 4. External application of Chinese herbal medicine: If there is no wound, apply Ruyi Jinhuang San to the red and swollen area and replace it as appropriate. Health education: 1. Choose shoes of appropriate size, fat and thin, suitable and light shoes, and pay attention to the care of the fingers in general. 2, nail clipping should not be too short, the finger has a small wound can be used iodine application soak. 3, do not pull out the barbs at will, once the barbs appear to cut with scissors, do not hard to pull out. 4, treatment of nail infection is a matter of urgency, once you have it should immediately seek medical attention. 5, during the treatment period should avoid eating spicy and stimulating food, the external application of gold scatter at least should be replaced as appropriate. 6, during the treatment of nail infection of the foot it is advisable to wear wide cotton shoes or slippers. 7.After the nail gouge is incised and drained, attention should be paid to changing the medication. 8, generally 3 to 5 days after surgery can be removed drainage strips. After the redness and swelling have subsided and the pain has been reduced, you should start functional exercises for your fingers to avoid tendon adhesions and scar contractures that can cause dysfunction.