What is the cause of fever after normal delivery: a. Normal fever, in the puerperium, maternal body temperature is generally normal, but if due to long labor, excessive physical exertion, extreme fatigue and tension of pregnant women, the temperature may rise after delivery, but generally does not exceed 38 ℃, after sufficient rest, more than 24 hours to recover. Second, abnormal fever, if the temperature reaches or exceeds 38℃ for 2 times in a row within 2-10 days after delivery is abnormal, consider it as puerperal infection. There are mainly the following cases: 1, vulva, vagina, cervix, perineal incision, these parts are common inflammation sites, often accompanied by redness, swelling, heat, pain, wound dehiscence, abnormal discharge, etc. 2, endometritis and myometritis, mostly occurring 3-5 days after delivery, malodorous or not malodorous dew, the lighter cases can have low fever, increased malodorous dew, odor, abdominal distension, lower abdominal pain; the heavier cases are accompanied by fever, chills, with lower limb 3. pelvic infection, which often occurs about 5 days after delivery with high fever and lower abdominal pain, may cause pelvic abscess and high fever. 4. thrombophlebitis, which often occurs 7-10 days after delivery or surgery and is prone to long-term bed rest, old age and obesity. 5. fever caused by acute mastitis, which can be accompanied by local redness, pain, hard nodes and even ulceration of the breast. In case of fever, it is recommended that the mother go to the hospital promptly.