The best meal within the first 24 hours after fissure surgery is watery and hearty foods such as light soups made of meat and chicken extract. To prevent constipation after fissure surgery, it is recommended to add more high-fiber foods, vegetables, and juices to your diet. In addition, drinking 8 glasses of water and enough physical activity can help you prevent constipation and recurrence of the anal fissure. It is also recommended to replace rice with boiled potato and avoid foods that can cause constipation, such as fast foods.