Postpartum blood pressure may be related to a history of hypertension, dietary factors, psychiatric factors, and kidney disease. 1. History of hypertension: Primary hypertension, that is, hypertension before pregnancy, and secondary hypertension during pregnancy may cause postpartum blood pressure not to come down. 2. Dietary factors: If the mother maintains a diet high in salt, fat and sugar during pregnancy and after giving birth, it may cause her blood pressure not to come down after delivery. 3. Mental factors: for example, if the mother is overly nervous and anxious after giving birth, or if she is overly depressed, the presence of these negative emotions may also affect her blood pressure. 4. Kidney disease: renal insufficiency, for example, can also lead to blood pressure can not fall. It is recommended that mothers should first exclude non-pathological factors, and then go to regular hospitals for examination and treatment if necessary.