Pregnancy sickness and hyperemesis gravidarum

Pregnancy sickness can last all day, despite the name “morning sickness”. Treatments are available when nausea and vomiting affect work, home life and mood.

When sickness tends to start and settle

The Royal College of Obstetricians and Gynaecologists, or RCOG, says sickness usually begins between the 4th and 7th week. It often improves as pregnancy progresses, but some people remain unwell for longer. You can ask for help at any stage.

UK and US guidance describes recovery timing differently. The NHS says sickness usually clears by weeks 16 to 20. ACOG says it goes away by 14 weeks for most women, while acknowledging that it can last throughout pregnancy. Neither description rules out continuing symptoms or the need for treatment.

Small changes that may make eating easier

For milder sickness, try small, frequent meals of plain foods, such as bread, rice, crackers or pasta. Dry toast or a plain biscuit before getting moving in the morning may help. Try to find something you can tolerate, without forcing down a particular meal.

Cold food may be easier if hot meals smell overwhelming. Avoid smells that set off nausea where you can, and make room for rest: tiredness can make it worse. Sipping fluids little and often may be easier than drinking a large amount at once.

The NHS says there is some evidence for ginger in food or drinks, but advises checking with a pharmacist before taking ginger supplements. If these everyday changes do not help, or symptoms are severe, speak to your care team about treatment rather than adding more products yourself.

When sickness becomes hyperemesis gravidarum

Hyperemesis gravidarum, often shortened to HG, is the severe form of pregnancy sickness. RCOG describes sickness that prevents daily activities and makes usual eating and drinking impossible. It can cause dehydration and may need hospital treatment. A clinician can assess what is happening and check for other causes of vomiting.

Contact your GP, midwife or NHS 111 today (UK), or your pregnancy care team or urgent care service (US and elsewhere), if vomiting comes with a high temperature, tummy pain, weight loss, or passing very little dark urine. Tell them about pain when peeing too. Mention whether you can keep fluids, food and medicines down, and whether you have lost weight rapidly.

Treatment can include medicines and fluids

Your clinician can discuss anti-sickness medicines, also called antiemetics. Some treatments can be given by injection if tablets will not stay down. Your pharmacist or doctor can advise about the medicine chosen for you. Do not stop or change a prescribed medicine without discussing it with your doctor.

Hospital assessment can include checks of your general health, blood and urine tests, and sometimes an ultrasound. Fluids through a drip may help if you cannot drink enough. Some people can go home after treatment; others need admission, especially if dehydrated or unable to keep fluids or oral medicine down.

RCOG says there is no evidence that mild to moderate nausea and vomiting harms the baby. With severe sickness or HG, the baby may have a lower than expected birthweight, and growth scans may be offered. Discuss persistent symptoms with your team.

Before leaving hospital, ask who to call if treatment stops helping and how to get more of your prescribed medicine. Keep those details with your care contacts. RCOG advises arranging a repeat prescription before tablets run out and contacting the care team for reassessment if symptoms return with dehydration.

Ask for help before you are exhausted

Call 999 now (UK) or 911 (US), or your local emergency number, if you vomit blood and feel generally unwell, faint or dizzy, or have tummy pain.

Get urgent medical help for any blood in vomit. If you have stopped vomiting blood and have no other symptoms, contact your GP or NHS 111 urgently (UK), or your doctor or urgent care service (US and elsewhere).

Contact your GP, midwife or NHS 111 now in the UK, or your pregnancy care team or urgent care service in the US and elsewhere, if you cannot keep liquids down, cannot pee, or feel dizzy or faint when standing. Do not wait for a routine appointment.

Ask about treatment if sickness is affecting daily life. Tell your care team if it is also leaving you low, anxious or isolated; RCOG recognises the emotional strain and recommends support. After hospital treatment, contact your team again if vomiting returns and you become dehydrated.