In patients with perianal abscess, if no internal opening is found, it is considered to be a subcutaneous type of infection, which is most commonly associated with underlying diseases such as diabetes mellitus, poor local hygiene, after soft tissue injury, or secondary to trauma, which can also lead to the formation of perianal abscess. The simple subcutaneous perianal abscess is relatively simple to treat, incision and drainage under local anesthesia, after the operation should actively change the medicine, reasonable diet, away from stimulating food. After each bowel movement, you should also carry out local washing, sitz bath, can promote the healing of the wound. The recovery of simple subcutaneous perianal abscess is relatively fast, and the abscess cavity can basically disappear within 1-2 weeks. However, attention should also be paid to avoid the formation of local scar tissue, affecting the postoperative defecation, but also to actively treat the primary disease, correct the changes in blood glucose, reasonable diet, increase nutrition, regular fumigation, sitz baths, and to observe the changes in the condition.