What is morning sickness vs hyperemesis?
Last updated September 3, 2026.
Morning sickness is the common queasiness that eases by mid-pregnancy while you still keep food and fluids down; hyperemesis gravidarum is relentless vomiting with dehydration and weight loss, per the NHS - thought to affect around 1 to 3 in 100 pregnancies and often needing hospital treatment. The line is functional: cannot keep fluids down for 24 hours, little dark urine, dizziness on standing, or losing weight - same-day call to your midwife or doctor. HG is a medical condition with effective treatments, not weakness, and it tends to recur - a history belongs in every future pregnancy plan.
What to do
- Use the 24-hour fluid rule. Nothing stays down for a day: same-day call.
- Watch urine and weight. Little, dark pee and dropping weight are the objective flags.
- Accept treatment early. Anti-sickness medication and IV fluids work - suffering is not required.
- Record it for next time. HG recurs; future pregnancies plan around it.
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