Gastritis is when the lining of your stomach becomes irritated (inflamed). It can cause pain, indigestion and feeling sick. Treatments include antacids, alginates and antibiotics.

Check if you have gastritis

Symptoms of gastritis include:

Immediate action required: Call 999 or go to A&E if:

  • you're vomiting bright red blood or your vomit looks like ground coffee
  • your poo is black, sticky and extremely smelly
  • you have severe tummy or chest pain that started suddenly

Urgent advice: Ask for an urgent GP appointment or get help from NHS 111 if:

You have symptoms of gastritis and:

  • you've lost your appetite
  • you feel full after a very small meal
  • you've recently lost weight without trying to
  • it feels like you have a lump in your tummy
  • it's painful or difficult to swallow
  • you keep being sick

These can be serious, so they need to be checked quickly.

You can call 111 or get help from 111 online.

Non-urgent advice: See a GP if:

  • you have tummy pain or indigestion for longer than 1 week
  • your tummy pain is getting worse or keeps coming back

Causes of gastritis

Causes of gastritis include:

Gastritis can also be caused by a problem with your immune system where it attacks the lining of your stomach.

What happens at your GP appointment

To find out what's causing gastritis symptoms, your doctor might arrange tests such as:

You should be told how to get ready for a breath test around 4 weeks before it happens.

Treatment for gastritis

Treatment for gastritis depends on what's causing it.

You might need:

If it's not treated, gastritis may get worse and cause a stomach ulcer.

If gastritis is not getting better, or it's causing severe symptoms, a GP might refer you to a specialist stomach doctor (gastroenterologist). They might do a test to look inside your stomach, called a gastroscopy.

Things you can do to help gastritis

If gastritis is causing mild indigestion symptoms, there are things you can do to help.


  • reduce the amount of drinks you have that contain caffeine, such as tea, coffee, cola and energy drinks

  • lie on an extra pillow in bed so your head and shoulders are higher, to help stop stomach acid rising up your throat while you sleep

  • lose weight if you're overweight

  • talk to your doctor if you regularly take anti-inflammatory painkillers (such as ibuprofen) or aspirin


  • do not eat 3 to 4 hours before going to bed

  • do not have food or drink that's acidic (such as orange juice), fizzy, spicy or fatty

  • do not drink alcohol

  • do not smoke

A pharmacist can help with mild indigestion

A pharmacist can recommend:

Some indigestion medicines are taken after eating, and some are taken before eating. Check the information leaflet that comes with the medicine.

Page last reviewed: 27 October 2022
Next review due: 27 October 2025