If there is no obvious redness, swelling or oozing, you can apply topical iodophor solution or Bactrim to treat the pain and try not to press on the painful area. However, if you find severe local redness and swelling, or even fluid oozing, you need to go to the hospital as soon as possible to improve the relevant examination. A portion of the nail will be removed under local anesthesia, and then the infected necrotic tissue will be removed, and regular medication changes will be required at a later stage. You should also pay attention to your diet, such as not drinking alcoholic beverages, not eating too spicy food, and consuming fresh fruits and green vegetables. Also try not to droop the fingers to prevent congestion, which can then cause an increase in pain. During the treatment period, try to keep the area out of water to prevent infection and also try not to overactivate to prevent local bleeding.