Patients with anal fissures can eat fish. However, for patients after anal fissure surgery, wound healing is very important, and while the patient keeps the stool open, if the granulation grows too fast or poorly, granulation trimming is needed. There is no special requirement for fish, but during the growth period of meat buds, Chinese medicine believes that eating black fish or perch has the effect of promoting the growth of meat buds, but eating too much black fish and perch makes the meat buds grow not too well, and the meat buds will need to be trimmed repeatedly. Therefore, patients with anal fissures can eat fish and also chicken and duck, both without special requirements, but do not pay too much attention to wound healing, just eat normally and keep the bowels open.