The causes and pathogenesis of high blood pressure in late pregnancy have not been fully elucidated, and its onset may be related to a variety of risk factors such as the patient’s age, family history, diet, emotional factors, and pre-pregnancy comorbidities. 1. Age: Older pregnant women aged ≥35 years are more likely to have elevated blood pressure during pregnancy. 2. Family history: A family history of hypertensive disorders in pregnancy, especially the mother and sisters, is likely to have elevated blood pressure in the second trimester. 3. Diet: Frequent consumption of high-fat and high-salt foods or lack of calcium, iron, zinc and selenium in the second trimester may also increase blood pressure. 4. Emotional factors: mental tension and negative emotions during pregnancy can also lead to increased blood pressure. 5. Pre-pregnancy comorbidities: Pre-pregnancy comorbidities such as antiphospholipid syndrome, systemic lupus erythematosus, kidney disease, diabetes, etc. are also prone to elevated blood pressure in the second trimester. If you have elevated blood pressure in the second trimester of pregnancy, you need to consult a doctor for timely examination and treatment as prescribed by the doctor.