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.
Information & Resources
What causes HG?
The GDF15 research explained clearly, alongside older theories.
How common is HG?
UK statistics explained, including hospital admissions and mental health impact.
Symptoms and diagnosis
How pregnancy sickness differs from HG, what to look out for, and how it's diagnosed.
Treatment and management
Practical measures, anti-sickness medication, medication safety, and hospital-based care.
Possible complications
What can happen if HG isn't treated, explained clearly and without alarm.
Living with HG
Work, relationships and family life, getting through the day, and emotional wellbeing.
Recovery after HG
Physical and emotional recovery, and thinking about another pregnancy.
Need Support?
If you're struggling with HG, you're not alone. Visit our Get Support page for resources, signposting, and advocacy information.
Get in Touch