Lateral incision usually refers to the side cut of a normal labor, while a wound that heals on the surface but is hard on the inside is usually the result of scar formation. A lateral perineal incision is a surgical procedure that ensures a smooth birth of the fetus. A lateral perineal incision is an oblique incision in the perineum. The lateral incision prevents perineal tearing and protects the pelvic floor muscles. A hard knot in the perineal incision is usually the result of scar tissue that proliferates during the healing process and hardens when touched, along with the absorption of tissue lining that creates a harder granulation tissue. The hardness usually softens over time. If the surface of the wound heals without oozing blood, no ooze, no pain to touch, generally do not need special treatment. It is recommended that the patient go to the hospital for examination to make a clear diagnosis. Usually pay attention to perineal cleanliness and hygiene, strengthen nutrition, promote wound healing, and regular examination. After giving birth, we should strengthen the wound care, the lateral cut wound should not be wet, and change the medicine on time, take a light diet, eat more food with crude fiber, to prevent dry stools or constipation. If you find any abnormalities such as rupture or oozing from the wound site, you should seek medical advice in a timely manner and under the guidance of the doctor, carry out targeted treatment.