14894 Cyclic Vomiting Syndrome

Overview

Cyclic vomiting syndrome is a condition that causes sudden, repeated episodes of severe vomiting, nausea, and retching. The episodes can last for hours or even days. Between episodes, the person usually feels completely well. It is not a stomach bug or food poisoning, even though it may look like one.

It is considered uncommon, but it may be more common than we realise because it is sometimes missed. Doctors are recognising it more often in both children and adults.

It can start at any age. It most often begins in childhood, usually between 3 and 7 years old, but it can also begin in adults. People who have migraines, or whose close family members have migraines, may be more likely to have it.

Symptoms

Common symptoms

• Sudden, severe nausea and vomiting
• Retching or heaving even when the stomach is empty
• Belly pain or discomfort
• Pale skin and extreme tiredness
• Headache or sensitivity to light and sound
• Drooling, spitting, or feeling unable to swallow comfortably

Symptoms in children

• Children may become very pale, irritable, and clingy during an episode
• They may vomit many times in one hour
• Episodes often start in the early morning or after a stressful or exciting event
• The child may look and feel completely well in between episodes

Symptoms in older adults

• Older adults may be more likely to become dehydrated quickly
• Symptoms may be mistaken for other digestive or heart problems
• Recovery may take longer, so early medical support is important

Causes

Main causes

• The exact cause is not fully understood
• It is thought to be a problem with how the brain and the gut communicate
• Episodes are often triggered by infections, stress, lack of sleep, certain foods, menstruation, motion sickness, or hot weather

Risk factors

• A personal or family history of migraine
• A personal or family history of anxiety
• Being under physical or emotional stress
• Irregular sleep patterns or frequently missing sleep

When to see a doctor

See a doctor urgently if:

• If you or your child has signs of dehydration
• If vomiting does not stop after 24 hours
• If there is blood or green fluid in the vomit
• If there is severe belly pain that is getting worse

Book a routine appointment if:

• If you notice a pattern of repeated, severe vomiting with normal health in between, see your GP
• If episodes are affecting school, work, or everyday life
• If you want help identifying triggers and making a plan

Diagnosis

There is no single test for cyclic vomiting syndrome. Your doctor will ask about your symptoms, look for a pattern of repeated episodes, and examine you. They will also check for other conditions that can cause similar symptoms.

Tests that may be done

• Blood tests to check for dehydration, electrolyte imbalance, or other causes
• Urine tests to rule out infection or kidney problems
• Stomach emptying tests
• An upper endoscopy — a test using a thin, flexible tube with a camera to look inside your stomach
• Imaging scans, such as an ultrasound, CT, or MRI, to look for other digestive problems

What to expect at your appointment

Your doctor may ask you to keep a diary of episodes, triggers, and symptoms. You may be referred to a specialist, such as a gastroenterologist or paediatrician. A diagnosis often requires at least three separate episodes with periods of completely normal health in between.

Treatment

Treatment has two main goals: to shorten episodes when they happen and to prevent future episodes. Your care team will help you build a personal plan based on your patterns and triggers.

Self-care at home

• Rest in a quiet, dark room during an episode
• Take very small, frequent sips of clear fluids to avoid dehydration
• Try an oral rehydration solution if your pharmacist recommends one
• Avoid strong smells, heavy meals, and bright lights during episodes
• Use a cool, damp cloth on your forehead or the back of your neck
• Keep a symptom diary to help spot your personal triggers

Medical treatments

Your doctor may prescribe medicines to help stop nausea, calm the stomach, or prevent episodes. Some people benefit from treatments used for migraine, medicines to reduce anxiety, or treatments that help the gut and brain communicate. These are always individualised and should be taken exactly as prescribed. If dehydration becomes severe, fluids may be given through a drip in hospital.

When is surgery considered?

Surgery is not a standard treatment for cyclic vomiting syndrome and is not usually recommended.

Living with this condition

Living with cyclic vomiting syndrome means learning to manage episodes and reduce their impact on school, work, and family. It helps to have a written action plan with your care team, tell trusted people about your condition, and know exactly when to seek medical help.

Lifestyle tips

• Keep a regular sleep schedule
• Manage stress with relaxation, breathing exercises, or talking therapy
• Eat regular meals and avoid skipping meals
• Avoid known trigger foods, strong smells, and excessive caffeine
• Pace yourself during exciting or busy times
• Carry a small emergency kit with fluids, a sick bowl, and your care plan

Diet and exercise

There is no one-size-fits-all diet. Eating regular, balanced meals may help. Some people find that fatty, highly processed, or acidic foods trigger symptoms, but this varies. Gentle activity such as walking can support overall wellbeing, but take it easy during an episode.

Mental health and emotional wellbeing

Repeated vomiting can be distressing and may cause anxiety about when the next episode will happen. It is normal to feel frustrated, worried, or exhausted. Talking to a doctor, nurse, or counsellor can help you cope.

Prevention

Episodes cannot always be prevented, but identifying and avoiding your personal triggers is the best way to reduce how often they happen.

Vaccines

There is no vaccine for cyclic vomiting syndrome.

Screening programmes

There is no routine screening test for the general population. If you have repeated episodes, your doctor may recommend tests to rule out other conditions.

Complications

If left untreated

• Severe dehydration
• Electrolyte imbalance, which can affect the heart and muscles
• Damage to the food pipe (oesophagus) from repeated vomiting
• Tooth enamel erosion from stomach acid
• Malnutrition or weight loss
• Missed school or work and reduced quality of life

Long-term outlook

Cyclic vomiting syndrome is not life-threatening for most people, and many children grow out of it by their teens. With a good care plan and support, most people can reduce the number of episodes and lead a full and active life.

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