Skip to main contentLast updated: 24-Oct-2026
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Stomach Cancer Surgeon
Apollo Hospital, Bhat, Gandhinagar · Gota OPD, Ahmedabad · 18 years of experience
★★★★★ Google: 4.89 from 216 reviews (Gota clinic) · 4.94 from 18 reviews (Apollo, Bhat)
In short
After part or all of the stomach is removed, the body needs time and some help: smaller meals, vitamins for life, and regular checks of weight and blood.
Weight falls in the first months. Most of the common problems, such as dumping, reflux and loose stools, can be managed once they are named.
Vitamin B12 is needed for life after a total gastrectomy. Iron, calcium and vitamin D are checked and given when low.
How stomach cancer is tested, staged and treated is set out on the stomach cancer treatment in Ahmedabad page. This post covers the years after the operation.
The stomach stores food and starts digestion. Without all or part of it, food moves faster, absorbs differently, and sits in smaller portions.
Most people settle into a new routine within a few months. They eat smaller meals more often. They learn which foods sit well. They take a few supplements. Many return to work and to their normal day.
The problems below are common, not rare. Knowing them in advance makes them easier to deal with, and easier to mention at the visit.
Some weight loss in the first six months is expected. It is larger after a total gastrectomy than after removing only the lower part of the stomach.
After the first months, weight often steadies, and some of it comes back over a year or two. It rarely returns in full. A weight that keeps falling is not normal and needs a reason.
Each of these can be looked for and treated. A dietitian visit at the first few follow-ups helps more than most people expect.
Eat small meals six or more times a day, chew well, and put protein in every meal. Drink between meals rather than with them.
If a full meal is too much, a nutrition drink or a soft, high-protein snack between meals fills the gap. A dietitian can set a daily target in simple terms.
Dumping happens when food leaves the stomach or pouch too quickly. It can come soon after a meal or one to three hours later.
| Early dumping | Late dumping | |
|---|---|---|
| When | 15 to 30 minutes after a meal | 1 to 3 hours after a meal |
| What you feel | Cramps, bloating, racing heart, sweating, dizziness, loose stools | Shakiness, sweating, weakness, hunger, a feeling of low sugar |
| Why it happens | Food rushes into the bowel and pulls fluid in | Sugar is absorbed fast, a surge of insulin follows, and sugar then drops |
| What helps | Small meals, less sugar, lying down for 30 minutes after eating | Complex carbohydrate with protein; a sweet snack to correct a drop |
If simple steps are not enough, medicines can help. A medicine taken with meals slows sugar absorption in late dumping. An injection that slows the gut is kept for severe cases.
Vitamin B12 needs the stomach to be absorbed. After a total gastrectomy it is given for life, and after a partial one it is checked often.
| Nutrient | Why it falls | How it is corrected |
|---|---|---|
| Vitamin B12 | The part of the stomach that helps absorb it is gone | Injection every 1 to 3 months, or high-dose tablets, as advised |
| Iron | Less acid means less iron is absorbed | Daily iron tablets; a drip into a vein if tablets are not tolerated |
| Calcium | Poor absorption and lower intake | Calcium tablets with meals, dose set by the doctor |
| Vitamin D | Poor absorption, little sun | Vitamin D3 tablets or sachets, then a repeat level |
| Folate, zinc, magnesium | Lower intake and absorption | Given only if a blood test shows a low level |
A blood count and these levels are checked at the follow-up visits. Tiredness, breathlessness, tingling in the feet or a sore tongue should not be put down to age. They often point to a shortfall that a simple supplement can fix.
Bones can thin over the years after a total gastrectomy, because calcium and vitamin D are absorbed poorly. A bone density scan finds this early.
Bile can flow back into the stomach that is left, or into the food pipe. This is more common after the older type of join called Billroth II, and after removal of the upper part of the stomach.
Reflux shows as burning in the chest, a bitter or green taste, vomiting of bile, or pain in the upper belly after meals.
New reflux after surgery is also a reason for endoscopy, to look at the join. This links to the follow-up plan on the post about follow-up after stomach cancer treatment.
Loose stools after a gastrectomy have several causes, so the cause is looked for before treatment is chosen. Some can be stopped quickly.
Oily, pale, floating stool with weight loss suggests the last cause. A stool test confirms it. Pancreatic enzyme capsules, taken with each meal, usually fix it. They are available in India.
Where the cancer allows, the surgeon can choose an operation that keeps more function. This is decided by the position of the cancer and the clear margin, not by preference.
Cancer clearance always comes first. A function-saving operation is chosen only when it removes the cancer as completely as the larger one.
More on how the choice is made is on the post about treatment of early stomach cancer.
Some people with diabetes find their sugar control improves after part of the stomach is removed. Others need their medicines changed. The change is not the same for everyone.
If you take tablets or insulin for diabetes, tell the team before surgery and again at the first follow-up. Eating less can lead to low sugar if doses are not reduced.
Low mood and worry are common after cancer surgery, and more so when eating is hard. They are real, and they can be treated.
Talking to the doctor, a counsellor or a family member helps. A short course of treatment for low mood often improves eating and weight too.
Do not wait for the next date if any of these appear:
Some loss in the first six months is expected, more after a total gastrectomy than a partial one. Weight then steadies. A weight that keeps falling needs a cause looked for.
This is often dumping, when food leaves the stomach too fast. Small meals, less sugar and lying down for half an hour after eating help. Medicines are available if these steps are not enough.
After a total gastrectomy, yes, by injection or high-dose tablets. After a partial one, the level is checked often and given when it is low.
Most people eat normal home food in small, frequent meals. Concentrated sugar is better limited, and fluids are kept between meals rather than with them.
They can, over the years, because calcium and vitamin D are absorbed poorly. A bone scan one year after surgery, with calcium and vitamin D every day, protects them.
Call if weight keeps falling, if you cannot eat, if food sticks, if you vomit blood or pass black stools, or if you feel faint after meals.
The full range of stomach cancer care is on the stomach cancer treatment page. For questions before you travel, call +91-63555-64601.
Shah’s Gastro, Cancer & Robotic Surgery Centre, Gota, Ahmedabad
Consultation, review of endoscopy, biopsy and scan reports, second opinions and follow-up.
Apollo Hospital, Bhat, Gandhinagar
Apollo Hospital International Limited, GIDC Bhat Industrial Estate, Bhat, Gandhinagar. Endoscopy and biopsy, CT scans, follow-up after stomach cancer surgery including total gastrectomy, and inpatient care.
Finished stomach cancer surgery and struggling to eat, losing weight, or feeling unwell after meals? Many of these problems have a cause that can be found and treated. The reports can be sent ahead on WhatsApp, so the visit starts with them already read. What you need is decided at the consultation, after examination. Call +91-63555-64601 Send your reports before the visit
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