The short answer
Feeding tubes block, leak and occasionally fall out. A tube that comes out in the first four weeks is an emergency, because the tract has not formed. This page covers preventing blockage, what leaking means, and which changes need a same-day call rather than a routine visit.
The goal is to prepare for common feeding-tube problems without attempting unsafe replacement or unclogging.
Know the tube type, placement date, external marking, feeding plan, and who replaces it.
Use only the flushing and unclogging method taught by the tube team.
Report dislodgement, severe pain, bleeding, new abdominal swelling, breathing trouble, or inability to use the tube under the urgent plan.
Choose how you want to understand this
The full explanation.
What a feeding tube is
A feeding tube carries liquid food, water and medicine straight into the stomach or the small bowel, through a small opening in the abdominal wall called a stoma. It is used when swallowing is unsafe, too painful, or physically blocked.
In cancer care, the usual reasons are dysphagia, meaning difficulty swallowing, from cancer of the gullet or the throat, and the raw, swollen mouth and throat that follow radiotherapy to the head and neck. Some tubes go in before treatment starts, so that weight and strength hold up during it.
The common types:
- PEG, short for percutaneous endoscopic gastrostomy. A camera passed through the mouth guides the tube into the stomach. It is held inside by a soft disc, the internal bumper.
- Radiologically inserted gastrostomy, placed under X-ray. It is used when a camera cannot pass, which is common in head and neck cancer.
- Balloon replacement tube or low-profile button. A small water-filled balloon holds it in. Buttons sit almost flat against the skin.
- G-J or PEG-J tube, with an extension that carries feed past the stomach into the jejunum, part of the small bowel. It is used for people who reflux or breathe feed into the lungs.
The four-week rule you must know
The tube does not sit in an open hole. After placement, a channel called a gastrocutaneous tract slowly forms between the stomach wall and the skin. That takes about 2 to 4 weeks, and longer in people who are severely malnourished, immunocompromised, or who have a lot of fluid in the abdomen.
Until the tract has matured, the tube is the only thing holding the stomach against the abdominal wall. If it comes out during those first 4 weeks, the stomach can fall away and leak into the abdominal cavity. That is peritonitis, and it is life-threatening.
After the tract has healed, the same event is far less dangerous but still urgent, because the hole starts to close as soon as the tube is out. Closure begins somewhere between 8 and 24 hours, and the tract has usually shut within 24 hours.
Get help now
Call emergency services or go straight to the emergency department if:
- The tube has come out and it was placed less than 4 weeks ago. Do not try to put anything back. Cover the opening with clean dry gauze and go now.
- Severe belly pain begins, or the belly becomes hard, rigid, or swollen and tender.
- Fever, belly pain and vomiting start after a tube change or after restarting feeds. That can mean a replacement tube ended up outside the stomach.
- Heavy bleeding comes from the tube or the stoma.
- Someone coughs, chokes, gurgles, or becomes breathless during a feed, or feed appears in the mouth. Stop the feed immediately and sit them upright.
- Temperature is 38.0 °C / 100.4 °F or higher. The CDC uses 100.4 °F and the NCI uses 100.5 °F. Use the lower number.
Call the tube team or nutrition nurse the same day if:
- The tube has come out and it is more than 4 weeks old. This is still a race. Cover the hole, do not force anything in, and be seen within hours, not tomorrow.
- The tube will not flush at all, or feeds will not run.
- Fluid leaks around the tube and soaks dressings or clothing.
- The skin around the stoma is red, sore, hot, or oozing yellow or green fluid.
- The tube has slid outward or inward, so the number or mark at the skin has changed.
- Feeds now cause vomiting, or the belly is hard and swollen an hour after every feed.
If the tube is out and you have been trained and told to do so, a clinician may ask you to slide a spare tube or catheter gently into the tract to hold it open. Never force it. After 24 hours, a blind, forceful attempt should not be made at all. That job belongs to a specialist.
Blockage, and how to prevent it
Blockage is the most common problem and the most preventable. Feed and crushed medicine dry into a plug inside the tube.
Prevention comes first. Flush with water before and after every feed and after every single medicine. Never put whole tablets down a tube. Ask the pharmacist for a liquid form, or for the tablets that can safely be crushed. Give medicines one at a time, with a flush between each.
To clear a tube that has blocked, use warm water and a large syringe. Draw back gently and push gently, over and over, letting the water sit for a few minutes between attempts. Patience clears most of them.
Do not push a wire, a straightened coat hanger, a skewer, or a guide wire into the tube. Do not pour in fizzy drinks or fruit juice unless your team specifically told you to. Some services stock an enzyme declogging kit; ask whether yours does.
Leaking around the tube
Some seepage is normal at first. Persistent leaking is not, and it usually means one of four things: the balloon has lost water, the tube is too loose or too tight, the stoma has stretched, or the stomach is not emptying.
If you have a balloon tube, the balloon can quietly lose water over weeks. How much fluid it should hold, and which fluid, is set by that particular device and is printed on the tube and in its manual; there is no figure that fits every tube, so read yours or ask the tube team rather than working from a general number. Check that the tube is still at the same number at the skin. Report leaks rather than padding them with more gauze, because leaking stomach juice burns skin fast.
Going up a size to stop a leak is rarely the answer and can make the stoma bigger still. Let the team decide.
Buried bumper and daily site care
If the outside fixing device is done up too tightly, the internal disc presses into the stomach wall, the tissue loses its blood supply, and the disc becomes buried. Warning signs are a tube that will not rotate or push in slightly, feeds that will not run, pain on feeding, and leaking.
Prevent it. Clean the skin around the tube 1 to 3 times a day with mild soap and water or saline, then dry it well. Once the site has healed and if your team agrees, unclip the tube from its fixing device, push it in slightly, rotate it, and settle it back at the same mark.
Sit upright for every feed and stay upright afterwards. Do not feed anyone lying flat. Do not use feed that has hung for more than 4 hours. If diarrhea starts, call the tube or nutrition team for advice before altering anything. They may have you slow the rate or pause briefly rather than stop food altogether, but that call is theirs to make.
Sources
- StatPearls (NCBI Bookshelf) — Percutaneous Gastrostomy and Jejunostomy
- StatPearls (NCBI Bookshelf) — Gastrostomy Tube Replacement
- MedlinePlus — PEG tube insertion: discharge
- MedlinePlus — Enteral nutrition (child): managing problems
- MedlinePlus — Gastrostomy feeding tube: bolus
- CDC — Watch Out for Fever (Preventing Infections in Cancer Patients)
Words to know
Tap any term to see what it means.
Common questions
What should I do if the tube is blocked?
Use only the flushing and unclogging method taught by your tube team. Do not use sharp objects, unapproved chemicals, or force to clear a blockage. If you cannot use the tube at all, report it under the urgent plan rather than waiting for a routine visit.
Which problems need urgent help?
Report dislodgement, severe pain, bleeding, new abdominal swelling, breathing trouble, or being unable to use the tube under the urgent plan. Do not wait for a portal response when someone may be in immediate danger. Contact local emergency services for immediate danger.
What should I know about my own tube?
Know the tube type, the placement date, the external marking, the feeding plan, and who replaces it. Ask the treating team to write down three separate levels of urgency, with the exact contact numbers and instructions for each.
What should I keep ready in case of a problem?
Keep the diagnosis, recent treatments and dates, medicines and last doses, allergies, devices, recent laboratory or imaging information, a symptom timeline, any measurements the team asked for, your location, a transport plan and advance directives together in one place.
Does a tube problem mean the cancer is causing it?
Not necessarily. This page does not establish that cancer is causing a symptom, and it does not give a universal threshold. Other conditions can cause similar changes. The safest next step depends on severity, speed, diagnosis, recent treatment, medicines, devices, and the person's baseline.
Questions to ask your doctor
Being prepared helps you get the most out of your appointments. Save or print these questions.
Tap a question to save it to your list (kept on this device).
Your next step
Turn this guide into a short list for your care team.
Speak With Trained Specialists & Human Navigators
Cancer Explained provides educational guidance, but does not replace trained specialists, social workers, or your medical team.
Talk to a trained cancer information specialist
Free, confidential assistance from NCI Cancer Information Service via phone, chat, or email.
Contact your oncology team
Locate after-hours contact numbers, portal messages, or urgent triage phone lines.
Find a patient navigator
Get one-on-one help with appointments, logistics, translation, and care coordination.
Find a genetic counselor
Discuss inherited mutation risk, family history, and genetic testing options.
Find an oncology social worker
Access emotional counseling, family support groups, and mental health resources.
Find a financial navigator
Locate copay assistance foundations, grant programs, and lodging/travel support.
Find a clinical-trial specialist
Search matching studies and speak with NCI trial information specialists.
Get urgent help
Immediate emergency guidance for fever (>100.4°F during chemo), severe pain, or shortness of breath.
Help Us Improve This Guide
Did this explanation answer your question and help you determine your next step?
Know someone who needs this?
Plenty of people are looking for something like this and do not know where to start. If this would help a friend or someone you love, send it on — we have written an opening line so you do not have to stare at an empty message. You can change every word of it.
Your message is written and sent in your own email or messaging app — we never see who you send it to, and nothing is added to any list.
Where to get help with this, by name
A hospital social worker or financial navigator is the best first call if you have one. If you do not, these organisations help at no cost to you.
- Patient Advocate Foundation — (800) 532-5274. Case managers take on insurance appeals, denials and medical debt with you. Free.
- TotalAssist (Patient Advocate Foundation's copay programme, merged with the PAN Foundation in 2026) — 866-512-3861. Help with medication copays, coinsurance and deductibles, insurance premiums, and office-visit and administration charges on the day of treatment, across nearly 150 conditions.
- CancerCare — 800-813-HOPE (4673). Oncology social workers, free counselling and support groups. Limited financial help with transport, home care, child care and lodging for people in active treatment who meet their income guidelines — funding is first-come, first-served, so call to ask what is open.
- Triage Cancer — 424-258-4628. Free legal and financial navigation: insurance, employment rights, disability.
- Blood Cancer United (formerly the Leukemia & Lymphoma Society) — (800) 955-4572. Information Specialists answer questions on treatment, insurance and financial problems.
- HealthCare.gov — 1-800-318-2596. For questions about the external review process — the independent review your insurer is required by law to accept.
Your state Department of Insurance regulates insurers and takes consumer complaints. On Medicare, your State Health Insurance Assistance Program (SHIP) gives free one-to-one counselling. If a specific drug is the problem, ask the manufacturer about its patient assistance programme.
Phone numbers checked 31 July 2026. Programmes and eligibility change — if a number has moved, please tell us.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Sources last checked: 2026-08-11 what this meansLast updated: 2026-08-19Next planned review: 2027-01-22
How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status — Editorial review complete. This page completed Cancer Explained's editorial checks (sources, safety, plain language, duplication). It has not been reviewed by a physician or other healthcare professional.
High-risk topic — talk to your care team. This topic can involve urgent, individual medical decisions. This page is general education only: it cannot tell you whether your situation is an emergency or what you personally should do. Follow your oncology team's instructions and contact them for individual guidance.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Editorial review complete — This page completed Cancer Explained's editorial checks (sources, safety, plain language, duplication). It has not been reviewed by a physician or other healthcare professional.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
Read more about our editorial process, our use of AI, and our corrections policy.
Spotted a problem? Report an error — a factual mistake, broken or outdated source, confusing wording, or anything that seems unsafe. Please do not include names, medical record numbers, dates of birth, addresses, or other identifying medical information in your report.
After using this page, do you understand what to do next?
Anonymous — we only record the answer, never who gave it.
Related articles
Still have questions?
Educational answers, plain language
Free to print and share