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Drooling and saliva control after tongue surgery | CION Cancer Clinics
Drooling after glossectomy is common in the first weeks and usually settles as swelling goes down and swallowing returns. You are not making more saliva. The tongue and lips can no longer sweep it back and hold it in. Deliberate swallowing, head position and lip exercises help most, and lasting drooling has treatments. This page explains the causes, what to do at home and when to ask for more. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- Why am I drooling after tongue surgery, and will it stop?
- What causes drooling after glossectomy?
- What helps control saliva at home?
- Words you may see about saliva, in plain language
- Four things families say about drooling, and what is true
- What this page cannot tell you
- Common questions about drooling after glossectomy
The short answer
Why am I drooling after tongue surgery, and will it stop?
Drooling after glossectomy is common in the first weeks and usually settles as swelling goes down and swallowing returns. It is not that you are making more saliva. It is that the tongue and lips can no longer sweep saliva to the back of the mouth and swallow it before it reaches the lip. For most people it improves steadily. For some, usually after a large operation, it needs active treatment.
What is actually going wrong
You swallow saliva hundreds of times a day without noticing. Each swallow needs the tongue to gather it and push it back, and the lips to hold it in. After surgery the tongue is swollen, partly numb and smaller. The lower lip may be numb or weak if a nerve in the neck was stretched. Saliva pools in the front of the mouth and runs out, especially when you lean forward, talk or sleep.
Who it affects most
People who have had the front of the tongue removed, a flap that fills the floor of the mouth, or surgery on the neck glands on both sides drool more and for longer. People who go on to radiotherapy often swap drooling for the opposite problem: thick, sticky saliva and a dry mouth.
Drooling is embarrassing and people hide it. Your team has seen it many times. Say so at the first review.More than one cause
What causes drooling after glossectomy?
A swollen, numb tongue
In the first weeks the tongue is too swollen and too numb to feel saliva building up or to move it back. This is the cause that improves fastest.
A weak or numb lower lip
A nerve that runs along the jaw controls the lower lip. Neck surgery can stretch it, so the lip on that side droops and does not seal. Feeling and movement usually return over months.
A tongue that cannot sweep
With part of the tongue gone, or a flap that does not move, saliva collects in the front of the mouth and under the tongue and is not cleared. This is the cause that needs relearning rather than waiting.
Worse when
- Leaning forward or looking down
- Talking for a long time
- Asleep on the side
A swallow that is not yet safe
If the therapist has said not to swallow yet, or you are avoiding swallowing because it hurts, saliva has nowhere to go. It comes out or is spat. This resolves as the swallow is rebuilt.
After radiotherapy the problem often reverses: less saliva, but thick and hard to clear.Not sure whether this applies to you?
Ask an oncologistDay to day
What helps control saliva at home?
Swallow on purpose
Set a reminder to swallow every few minutes, and always before you speak, lean forward or stand up. A conscious swallow does what the tongue used to do automatically. This single habit helps most.
Head up, chin level
Keep the head upright, not tilted down over a phone or a plate. Sleep propped up on two pillows, on the back or the stronger side, with a towel over the pillow.
Lip and tongue exercises
The speech therapist gives lip-closing, lip-stretching and tongue-sweeping exercises. Done several times a day they rebuild the seal and the sweep. Ask for them if none have been given.
Look after the skin
Saliva on the chin and neck causes soreness and cracking. Dab, do not wipe. Put a barrier cream on the chin and the corners of the mouth. Keep a small towel and change it often.
Ask about treatment if it is not settling
If drooling is still heavy months on, there are medicines that reduce saliva and injections into the salivary glands that quieten them for a time. Each has drawbacks and is a decision with your team.
On your notes
Words you may see about saliva, in plain language
- Sialorrhoea
- The medical word for drooling. After tongue surgery it almost always means saliva is not being cleared, not that too much is being made.
- Lip competence
- Whether the lips can close fully and hold saliva in. Poor lip competence is a common cause of drooling after neck surgery.
- Marginal mandibular nerve
- The nerve along the jaw that moves the lower lip. Stretching it during neck surgery causes a drooping lip that usually recovers.
- Anticholinergic
- A family of medicines that dry up saliva. Glycopyrrolate is one. They can also cause a dry mouth, constipation and blurred vision, so they are used with care and only on prescription.
- Botulinum toxin injection
- An injection into the salivary glands that quietens them for several months. Done by a specialist, sometimes with ultrasound guidance. It wears off and can be repeated.
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Commonly believed
Four things families say about drooling, and what is true
"He is producing far too much saliva since the
operation."
The glands are making the same amount as before. What has changed is that it is not being swallowed. Treating it as a swallowing and lip problem, with exercises and deliberate swallows, works better than trying to dry the mouth out.
"It will stop on its own, so there is no need to
mention it."
Much of it does settle on its own. The part that comes from a tongue that cannot sweep, or a lip that cannot seal, improves faster with exercises. And drooling that is still heavy after months has treatments that only start when someone asks.
"Drooling means the operation went wrong."
It is an expected effect of removing part of the tongue and of neck surgery, not a complication. It says nothing about whether the cancer was fully removed. That answer is in the pathology report, not on the chin.
"She should stop drinking so much, then there
will be less to drool."
Cutting fluids makes saliva thicker and harder to clear, dries the mouth and risks dehydration. Keep drinking. Small, frequent sips with a deliberate swallow after each are the right pattern.
Being straight with you
What this page cannot tell you
This page cannot tell you how long your own drooling will last. Drooling from swelling and numbness settles over weeks. Drooling from a stretched lip nerve settles over months. Drooling from a tongue that is too small or too fixed to sweep may not fully settle, and that is the group who benefit from the treatments above. Your surgeon and therapist can tell you which group you are in.
Thick saliva is a different problem
After radiotherapy many people stop drooling and start struggling with thick, ropy saliva that sticks in the throat and is hard to clear. The advice is almost the opposite: drink more, rinse often with a mild salt and soda mix, use a saliva substitute, and avoid the drying medicines that help drooling. If you have both problems at different times of day, say so, because the treatments conflict.
What to ask at the next review
Ask whether the lower lip nerve was affected and what to expect from it. Ask for lip and tongue exercises. Ask at what point the team would consider medicines or injections, and what their drawbacks are.
If the skin of the chin has broken down, or drooling is keeping you at home, call the helpline. Both can be helped.Questions we are asked
Common questions about drooling after glossectomy
How long will the drooling last?
For most people it eases noticeably over the first weeks as swelling settles and swallowing returns, and keeps improving for months as the lip recovers. A smaller number, usually after a large operation with a flap, have lasting drooling and are offered treatment for it.
Why is it worse at night?
Asleep, you stop the deliberate swallows that keep it under control during the day, and lying flat lets saliva run forward. Sleep propped up, on the back or the stronger side, with a towel on the pillow. It improves as the automatic swallow returns.
Is there a medicine to stop it?
There are medicines that reduce saliva, such as glycopyrrolate, and they are prescribed when exercises are not enough. They also dry the mouth, which can make eating harder, so the team weighs one problem against the other. Never take one without a prescription.
What are the injections I have heard about?
Botulinum toxin injected into the salivary glands quietens them for some months. It is done by a specialist, often with ultrasound to guide the needle, and it wears off, so it can be repeated. It is usually offered when drooling is lasting and heavy, not in the early weeks.
My lower lip droops on one side. Is that permanent?
Usually not. The nerve along the jaw is often stretched during neck surgery and recovers over months. Lip exercises help. If the surgeon has told you the nerve had to be cut, the droop is more likely to last, and there are ways to manage it.
The skin on my chin is raw. What should I do?
Dab rather than wipe, dry the skin gently, and use a barrier cream from the pharmacy at the chin and the corners of the mouth. Change the towel often. If the skin has cracked or looks infected, show your team rather than waiting for the next review.
Can I go out or go back to work while this is happening?
Yes, with planning. A small towel or handkerchief, a deliberate swallow before speaking, and keeping the head level all help. Many people find that drooling is far less visible to others than it feels. Tell the therapist if it is keeping you at home; that is a reason to step up treatment.
Does radiotherapy make drooling better or worse?
Often it swaps the problem. Radiotherapy to the mouth reduces saliva and thickens what is left, so drooling may stop but thick saliva and dry mouth take its place. The advice for those is different, so tell your team which one you are dealing with.
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Sources
- Macmillan Cancer Support — Mouth cancer
- Cancer Research UK — Mouth and oropharyngeal cancer
- NHS — Mouth cancer
- National Cancer Institute — Mouth and throat problems during cancer treatment
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Swallowing After GlossectomyThe swallow that clears saliva, and how it is rebuiltSpeech Therapy After Tongue SurgeryThe therapist who gives the lip and tongue exercisesAppearance and Speech: What Family Should ExpectThe drooping lip and other visible changesWound, Stitches and ScarsLooking after skin after any cancer operationGlossectomyThe whole cluster on tongue surgery
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Drooling that is not settling?
Tell us what operation was done and how long ago. We will help you reach a speech and swallowing therapist and a surgical oncologist who can review it.