Understanding Hyperemesis Gravidarum
Comprehensive information for sufferers and carers about HG: what it is, symptoms, diagnosis, treatment options, and how to manage daily life.
Quick Summary
Hyperemesis Gravidarum (HG)is severe pregnancy sickness — well beyond typical morning sickness. It causes persistent, often debilitating nausea and vomiting that can lead to dehydration, weight loss, and serious complications if it isn't treated.
HG affects around 1 to 3 in every 100 pregnanciesin the UK, making it one of the most common serious complications of early pregnancy — yet it's still under-recognised by many healthcare professionals. Learn more about HG in numbers.
Getting diagnosed and treated early matters. Evidence-led care — including lifestyle measures, medication, and specialist support — can make a real difference to how you get through this.
Not Sure Where to Start?
Our interactive HG Symptom Guide can help you get a sense of your situation. Answer a few simple questions about what you're experiencing.
Start the Symptom GuideInformation & Resources
What is Hyperemesis Gravidarum?
What HG actually is, how common it is, and how it differs from normal pregnancy sickness.
Symptoms and Diagnosis
What to look out for, and how doctors diagnose HG.
Treatment and Management
Medication, lifestyle support, and what evidence-based care looks like.
Possible Complications
What can happen if HG isn't treated, explained clearly and without alarm.
Living with HG
Practical, everyday advice: work, relationships, eating, and getting through each day.
Recovery & Postpartum
What to expect after birth, and support that continues beyond pregnancy.
Need Support?
If you're struggling with HG, you're not alone. Visit our Get Support page for resources, signposting, and advocacy information.
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