Gastric Outlet Obstruction

Causes can be benign (non-cancer) or malignant (cancer). Benign causes include scarring from long-standing peptic ulcers, swelling from active ulcers, Crohn's disease, swallowed objects, and rarely a narrowing from caustic injury or a condition in babies called pyloric stenosis. Malignant causes include cancer of the stomach, pancreas, bile duct or duodenum pressing on or growing into the outlet. Finding the cause is essential because treatment differs.

It is uncommon. Today it is seen less often from ulcers than in the past, and more often from tumours of the stomach, pancreas or nearby areas.

The doctor examines you and checks blood tests for dehydration and salt imbalance. Upper endoscopy (a flexible camera passed through the mouth under sedation) is the key test to see the blockage and take biopsies (tiny tissue samples). A CT scan shows the stomach, pancreas and nearby structures. Sometimes a barium X-ray or a stomach-emptying test is used. If the stomach is full of fluid, it may be emptied first so that endoscopy is safe.

Do not try to treat persistent vomiting at home. These steps support care while you arrange medical review.

• Seek medical care early if vomiting continues for more than a short time or you cannot keep fluids down.

• Do not use laxatives or herbal remedies to "clear" the stomach.

• Avoid smoking and alcohol.

• Do not stop prescribed medicines without advice, and avoid NSAID painkillers unless your doctor agrees.

• Keep a record of your weight and symptoms for your appointments.

Nutrition becomes hard when food cannot leave the stomach. Advice depends on how severe the blockage is, so follow your team's plan.

• You may be asked to stop eating for a while so the stomach can rest and be emptied.

• When allowed to eat, small frequent meals of soft or liquid foods are usually easier.

• Avoid foods that are hard to digest such as tough meat, raw vegetables with skins, nuts and large amounts of fibre if advised.

• A dietitian may suggest nutritional drinks or, if needed, feeding through a tube or a vein.

Medicines help symptoms and treat some causes but do not open a fixed blockage. Your doctor decides which are right.

• Fluids and salts are given through a vein to correct dehydration.

• Acid-suppressing medicines (such as PPIs) treat ulcer-related swelling.

• Antibiotics are used if H. pylori is found.

• Anti-sickness medicines may be used, but "gut-moving" medicines are avoided when there is a true blockage.

Opening the blockage is often needed. The choice depends on the cause, your general health and your wishes.

• A tube through the nose or mouth can drain the stomach first.

• Balloon stretching (dilation) during endoscopy can widen scar-related narrowing.

• An endoscopic stent can relieve a blockage caused by a tumour.

• Surgery can bypass the blockage or remove the diseased part, and is chosen for suitable patients.

• Treatment of the underlying cancer may involve chemotherapy, radiotherapy or surgery, planned by a specialist team.

For people with a blockage from advanced cancer, a stent (a small expandable tube placed by endoscopy) can relieve symptoms with a shorter recovery than surgery in many cases; newer techniques can also create a new passage between the stomach and bowel under endoscopic guidance. The best option depends on your health, your outlook and the available expertise.

The outlook depends on the cause. Blockages from healed ulcers or temporary swelling often improve a lot with treatment, while blockages from cancer need a plan from a multidisciplinary team to relieve symptoms and treat the cancer when possible.

• What is blocking my stomach outlet?

• Do I need endoscopy, a CT scan or other tests?

• Which treatment is best for me: dilation, stent or surgery?

• How should I eat and drink in the meantime?

• When should I come back urgently?

This guide comes from the Saudi Gastroenterology Association (SGA) patient library, prepared by the Approved for publication by SGA; individual clinician review is ongoing. Last reviewed: 2026-04-24. It is for education and does not replace your doctor's advice.