Headache after pregnancy may be caused by the following aspects: First, it may be caused by lack of sleep. Most women may suffer from insomnia during pregnancy, which may cause headache symptoms. Secondly, it may be caused by excessive mental stress. Thirdly, it may be caused by hormone secretion disorder in the body, some imbalance in hormone secretion during pregnancy may lead to some adverse reactions of pregnant women, such as headache or nausea, vomiting, if the phenomenon of headache occurs, you can press the temple action, you can get effective relief. If the headache is serious, it is better to see a doctor in time.