Smoking and pre-eclampsia: what to know

Pre-eclampsia is a pregnancy complication involving high blood pressure and signs that organs such as the kidneys or liver are under strain. It can begin during pregnancy or after birth and may occur without obvious symptoms. Smoking should not be used to lower risk; tobacco smoke reduces oxygen delivery and can harm pregnancy health. The relationship between smoking and pre-eclampsia is complex, so a person should not change care based on a perceived protective effect.

Blood-pressure checks, urine testing, questions about symptoms, and assessment of the baby’s growth help the maternity team decide whether closer monitoring is needed.

Tell your midwife or obstetrician how much you smoke, vape, or are exposed to second-hand smoke. Ask for confidential stop-smoking support; do not start or stop a nicotine product without pregnancy-specific advice. Keep antenatal appointments even when you feel well, because pre-eclampsia may be silent. Take prescribed medicines exactly as directed and attend any recommended blood-pressure or fetal-growth checks.

If pre-eclampsia develops, the team may discuss monitoring, medicines, timing of birth, induction of labour, or caesarean section according to your health, pregnancy stage, and the baby’s condition.

Contact your maternity service urgently for a severe or persistent headache, vision changes, pain under the ribs, sudden swelling of the face or hands, marked shortness of breath, vomiting, or feeling seriously unwell. Reduced baby movement needs prompt assessment. After birth, seek urgent help for these symptoms too, because pre-eclampsia can occur postpartum.

How will my blood pressure and urine be monitored? Which stop-smoking options are suitable during pregnancy? Do I need extra checks for the baby’s growth? What symptoms mean I should call the maternity unit immediately?