Generally, after anal fistula surgery, it is relatively more painful on the 5th-7th day. Because the 5th-7th day after surgery is the scabbing period after anal fistula surgery, the wound starts to grow granulation tissue, which may cause pain due to pulling during defecation, fecal stimulation of the wound, and even trigger bleeding. Coupled with the contraction of the sphincter muscles of the anus, it will aggravate the stimulation of the patient’s pain threshold, so this time is the most painful time. In the 5th-7th day after the anal fistula surgery, pay attention to drink more water, ensure smooth bowel movement, avoid dry stool, dry knot, pay attention to keep the wound clean and hygienic, you can use salt water to rinse the wound. After anal fistula surgery can be under the guidance of the doctor, the use of painkillers to relieve the symptoms of pain, such as ibuprofen capsules, lidocaine gel and other drugs. After surgery, pay attention to diet light, drink more water, do not eat spicy stimulating food, so as not to stimulate the wound infection. You can eat some high protein, multi-vitamin and other nutritious food, such as eggs, milk, chicken, pears, apples, etc. in order to promote the healing of the wound and help the growth of granulation tissue. After anal fistula surgery, patients should actively cooperate with the doctor’s treatment, regular disinfection and medication, regular follow-up, to avoid false healing, recurrence of infection and other adverse phenomena.