Why do I get dizzy during pregnancy?

Feeling dizzy or faint in pregnancy is common enough that the NHS lists it among the routine complaints, and the causes are mechanical. Hormones relax and widen blood vessels, so blood pressure runs lower - especially in the first half of pregnancy - and standing up fast or standing still long can outrun your circulation. Blood sugar dips when meals stretch too far apart. Later in pregnancy, lying flat on your back lets the heavy uterus compress the big vein returning blood to the heart - which is why dizziness on your back is the classic sign to roll onto your side. Anemia, which pregnancy makes more likely, adds its own lightheaded fatigue. The management: rise slowly, eat small frequent meals, hydrate, avoid long standing and overheated rooms, and after mid-pregnancy, favor your left side for sleep and rest. If you feel faint, sit or lie down immediately - on your side - before you fall. When to call: actual fainting, dizziness with vaginal bleeding or abdominal pain, dizziness with a racing heart, chest pain, or breathlessness, or dizziness that keeps recurring despite the basics - those combinations need assessment, since they can flag anemia, blood pressure problems, or heart issues. Mention recurring dizziness at your next prenatal visit even if it seems minor; a blood count is a routine check. Pymander is a free AI doctor, 24/7 by text. Describe when it happens, and it can help you sort the likely cause.