Inflammatory disease caused by infection with Pseudomonas aeruginosa, Pseudomonas aeruginosa, Aspergillus or Candida that results in pus around the nail. Therefore, it is necessary to take precautions, pay attention to the cleanliness of the perinail area, and cut nails regularly to avoid the occurrence of sub nail abscess. The treatment of sub nail abscess should first be symptomatic for the cause and can be done with topical antiseptic or antifungal medication such as Dacron ointment. If treatment is ineffective, it is recommended that patients with subxiphoid abscesses can choose surgical treatment, which can be done by local incision and drainage or nail extraction, and after surgery, attention should be paid to the cleanliness of the affected area to avoid recurrence. At the same time, we should pay attention to a light diet, which is conducive to the recovery and treatment of the disease, and eat less spicy, stimulating and greasy food.