If you have just had a medical abortion, it is normal to have this symptom. There are many reasons for back pain. After a medical abortion, you do not give yourself enough rest time, do not have enough nutritional intake, or do not pay attention to the hygiene and cleanliness of the vulva. Prolonged bed rest may also lead to lumbar discomfort, which can be relieved with appropriate hot compresses. You should pay attention to warmth and rest, food should be mainly warm and tonic, avoid contact with cold water for half a month, and forbid to have sex within 30 days. If the situation continues to be serious, it is recommended to go to the hospital to check the uterus.