Red side incision 4 months after delivery may be due to scar proliferation, damaged skin recovery, wound infection and other reasons. 1. Scar proliferation: after giving birth to a cut when the body repair factor due to wound stimulation, there may be excessive proliferation of skin connective tissue, and thus the formation of hyperplastic scars, manifested in the wound is more red symptoms, the naked eye will see significantly higher than the skin irregularities, unevenness of the hard knots and other conditions. 2. Damaged skin recovery: the skin needs to be sutured at the wound after delivery, and the damaged skin surface needs some time to recover, and reddened scars may appear, which usually takes about 3 to 6 months, and it is normal to simply have red wounds 4 months after delivery. 3. Wound infection: the healing process of the wound after delivery may lead to inflammation around the wound infection, redness, but also may cause the wound heat, pain, swelling and other symptoms. Four months after the birth of the side incision red, it is recommended to go to the hospital in a timely manner, after the doctor’s interview to clarify the cause of the disease, and comply with the doctor’s instructions on the cause of the treatment.