Risks and benefits of gastroscopy

Overview

A gastroscopy is a test where a doctor uses a thin, flexible tube with a tiny camera to look inside your stomach and the upper part of your gut. It helps find problems like ulcers, inflammation, or abnormal growths.

Yes, gastroscopy is a very common procedure. Thousands are done each day in the UK and around the world.

It is used for people of all ages who have symptoms like persistent heartburn, stomach pain, nausea, vomiting, or difficulty swallowing.

Symptoms

Common symptoms

• Persistent heartburn or indigestion that does not go away with over-the-counter remedies
• Unexplained stomach pain that keeps coming back
• Feeling sick or vomiting without a clear cause
• Trouble swallowing food or liquids

Symptoms in children

• Slow growth or weight loss
• Tummy pain that wakes the child up at night
• Vomiting that is green or blood-stained

Symptoms in older adults

• Unexplained weight loss or loss of appetite
• Anaemia (low red blood cells) with no other cause
• Black, tarry stools (which can mean bleeding in the stomach)

Causes

Main causes

• Gastroscopy is often done because of symptoms like pain, reflux, or bleeding.
• It can also be performed to check on known conditions such as ulcers or Barrett's oesophagus.

Risk factors

• Long-term use of certain painkillers (like ibuprofen or aspirin) can increase stomach problems.
• Being overweight or obese raises the risk of acid reflux and oesophagitis.
• Smoking and heavy alcohol use can damage the stomach lining.

When to see a doctor

See a doctor urgently if:

• If you have blood in your vomit or black stools
• If you are losing weight without trying
• If you have severe pain that does not go away

Book a routine appointment if:

• If you have persistent heartburn or indigestion that lasts more than three weeks
• If you have trouble swallowing that is not getting worse suddenly
• If your doctor wants to follow up on a previous stomach condition

Diagnosis

Gastroscopy is both a diagnostic test and sometimes a small treatment. The doctor looks inside your stomach and oesophagus on a screen and may take tiny tissue samples (biopsies) to check for diseases.

Tests that may be done

• A physical exam and discussion of your symptoms
• Blood tests to check for anaemia or infection
• A gastroscopy (may be done with or without sedation)

What to expect at your appointment

You will be asked not to eat or drink for several hours before the test. The doctor will spray a local anaesthetic on your throat and give you a sedative to help you relax. You lie on your side as the tube is passed gently down your throat. The test usually takes about 5 to 15 minutes. Most people feel little or no discomfort.

Treatment

A gastroscopy itself does not treat conditions, but it can help doctors find problems and sometimes treat them right away. For example, small growths (polyps) can be removed, or bleeding can be stopped during the test.

Self-care at home

• After the test, rest for a few hours and do not drive or operate machinery until the sedation wears off (usually overnight).
• Eat soft, light foods for the rest of the day if your throat feels sore.
• Take paracetamol (if safe for you) for mild throat discomfort – but always check with your doctor first.

Medical treatments

Treatment for conditions found during gastroscopy depends on the diagnosis. For example, acid reflux may be treated with lifestyle changes and medicines that reduce stomach acid. Infections can be treated with antibiotics. Ulcers can be healed with acid-suppressing medicines. If suspicious cells are found, your doctor will explain the next steps, which may include further tests or procedures.

When is surgery considered?

Surgery is rarely needed after a gastroscopy. It may be considered if a growth is large or if there is a hole (perforation) in the stomach lining. Your doctor will discuss this if it is necessary.

Living with this condition

Most people recover quickly after a gastroscopy. You may feel a bit drowsy from the sedation, so plan to rest for the day. Your throat might feel scratchy for a day or two, but this is normal.

Lifestyle tips

• Avoid smoking and heavy alcohol use – both can irritate your stomach and increase risks.
• If you have acid reflux, try eating smaller meals and not eating within three hours of bedtime.
• Manage stress with relaxation techniques like deep breathing or gentle exercise.

Diet and exercise

You can eat normally after the test unless your doctor says otherwise. For ongoing stomach health, eat a balanced diet with plenty of fruits, vegetables, and fibre. Gentle exercise, like walking, is fine the next day. Avoid heavy lifting or intense activity until you feel fully recovered.

Mental health and emotional wellbeing

Some people feel anxious before or after the procedure. It is normal to worry. Talking to your healthcare team about your concerns can help. Most people find the test much easier than they expected.

Prevention

Gastroscopy itself is not something you can prevent – it is a test that may be needed. However, you can lower your risk of stomach problems by not smoking, limiting alcohol, and maintaining a healthy weight.

Screening programmes

Screening for stomach cancer is not routinely done in the UK for people without symptoms. But if you have a strong family history of stomach cancer, your doctor may recommend regular gastroscopies to check for early changes.

Complications

If left untreated

• If a serious condition like a bleeding ulcer or cancer is missed, it can become worse over time.
• Delaying a needed gastroscopy can mean missing the chance for early treatment.

Long-term outlook

Gastroscopy is a very safe procedure. Serious complications are rare – they happen in less than 1 in 1000 tests. These may include a small tear in the gut lining, bleeding from a biopsy site, or an allergic reaction to the sedation. Your healthcare team will discuss these risks with you before the test so you can make an informed choice. For most people, the benefits – finding the cause of symptoms or treating a problem early – far outweigh the small risks.

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