Pre-eclampsia is one of the pregnancy comorbidities, a more serious and frequent type of gestational hypertension, which is divided into mild and severe. The symptoms are as follows: 1. mild preeclampsia: no conscious symptoms, mainly hypertension and urine protein; 2. severe preeclampsia: in addition to hypertension and urine protein, there are conscious symptoms such as headache, dizziness, blurred vision, gastrointestinal symptoms such as pain in the liver area, stomach pain and vomiting, cardiovascular symptoms such as heart failure, and abnormal laboratory tests such as urine protein, abnormal liver function, abnormal kidney function, hypoproteinemia, etc. .