Preeclampsia and High Blood Pressure in Pregnancy

The different diagnoses

Gestational hypertension is new high blood pressure after 20 weeks without other signs of organ involvement. Preeclampsia is high blood pressure plus signs that other organs are affected — protein in the urine, or abnormal liver/kidney function, low platelets, severe headache, or vision changes. HELLP syndrome is a severe variant involving the liver and blood cells. All of these are on a spectrum, and gestational hypertension can progress to preeclampsia, which is part of why ongoing monitoring matters even after an initial normal-seeming reading.

Symptoms that warrant same-day evaluation

A severe or persistent headache that doesn't respond to your usual medication.

Vision changes — blurriness, flashing lights, or seeing spots.

Sudden or severe swelling, especially in the face or hands (some swelling is normal in pregnancy; sudden or severe swelling is not).

Pain in the upper right abdomen or shoulder, or nausea/vomiting in the third trimester.

A blood pressure reading at home significantly above your baseline.

Why home blood pressure tracking helps

Preeclampsia can develop between visits, and it can also develop for the first time after delivery — up to six weeks postpartum, even after a completely normal pregnancy. A home blood pressure log gives you and your provider real data between appointments rather than relying on how you happen to feel that day, and it's specifically useful for catching a trend before it becomes a same-day emergency.

Risk factors and prevention

A first pregnancy, a prior history of preeclampsia, carrying multiples, chronic hypertension, obesity, and certain autoimmune conditions all raise risk. For people with these risk factors, low-dose aspirin starting in the first trimester meaningfully reduces the chance of developing preeclampsia — this is a conversation worth having early, not after risk factors have already become relevant.

Treatment

Management depends on severity and gestational age — ranging from closer monitoring and blood-pressure medication, to hospitalization, to delivery when it's the safest option for both the pregnant person and the baby. Delivery is the definitive treatment for preeclampsia; the specific timing balances that against the risks of prematurity.