Can tonsils or adenoids cause snoring in adults?

Short answer: Yes. Enlarged tonsils can narrow the airway and cause snoring or obstructive sleep apnea in adults as well as children. Adenoids, which usually shrink by the teenage years, sometimes remain enlarged in adults and block the back of the nose. In carefully selected adults, removing large tonsils can significantly improve breathing during sleep.

Key takeaways

• Large tonsils can crowd the throat and cause snoring or sleep apnea in adults.
• Adult adenoid enlargement is less common but can block nasal breathing.
• An ENT can grade tonsil size and check other levels of the airway.
• An ENT evaluation confirms whether sleep apnea is present before surgery is considered.

Why can tonsils and adenoids cause snoring in adults?

Tonsils and adenoids can cause snoring because they take up space in an airway that already narrows naturally during sleep.

The tonsils are two pads of tissue on either side of the back of the throat. The adenoids are a similar pad at the very back of the nose, above the soft palate. Both are part of the immune system and are largest in childhood.

In many adults, tonsils shrink with age. In some, they remain large, often after repeated infections. When you sleep, throat muscles relax, and big tonsils can push inwards, narrowing the airway. Air moving through that tight space makes the soft tissues vibrate, causing snoring. If the airway closes for seconds at a time, it becomes sleep apnea.

Adenoids usually shrink by the late teens. In a small number of adults they stay enlarged or regrow, sometimes because of allergies or chronic infection. This blocks the back of the nose and pushes people into mouth breathing, which makes snoring more likely.

What signs suggest your tonsils or adenoids are involved?

Several signs suggest that tonsils or adenoids may be contributing to your snoring.

• Snoring that started in childhood and never fully settled
• Frequent sore throats, tonsillitis or tonsil stones (small white deposits that can cause bad breath)
• Blocked nose with mouth breathing, especially at night
• Waking up with a dry mouth
• Daytime sleepiness or unrefreshing sleep
• Breathing pauses noticed by a partner

What can you do at home?

You can reduce some of the snoring at home, but large tonsils will not shrink with home measures.

• Sleep on your side to reduce how much the tonsils and tongue fall back.
• Avoid alcohol and sedatives close to bedtime.
• Keep your nose clear with saline rinses, especially during allergy season.
• Gargle with warm salt water during sore throats and stay well hydrated.
• Practise good oral hygiene, which may help with tonsil stones.

If your partner notices you stop breathing during sleep, ask your doctor about an ENT evaluation.

How are breathing, sleep and energy connected here?

Large tonsils can quietly reduce the quality of your sleep for years.

Many adults with big tonsils have snored for so long that they assume feeling tired is normal. When the airway is crowded, sleep is often lighter and more broken. When the obstruction is addressed, patients have reported waking more refreshed and having steadier energy for work and exercise. Nasal breathing may also feel easier if adenoids are part of the problem.

How does nose breathing support energy and BMR?

Your basal metabolic rate (BMR) is the energy your body burns at rest to keep the heart beating, the brain working and cells repairing. Your cells make that energy using oxygen, so how well you breathe matters.

Nose breathing helps in two ways:

• Warm, moist, filtered air. The nose warms, humidifies and filters each breath before it reaches the lungs. Conditioned air is gentler on the airway lining, which matters in Bangalore's air-conditioned offices and traffic dust. Mouth breathing skips this step and can leave the throat and airways dry.
• Nitric oxide from the sinuses. The paranasal sinuses continuously make nitric oxide (NO), a natural gas. When you breathe in through your nose, small amounts of this NO travel to the lungs, where studies suggest it may help widen tiny blood vessels and improve oxygen uptake. Mouth breathing largely bypasses it.

Nose breathing does not "boost" your BMR. That is set mainly by muscle mass, age, body size and hormones such as thyroid. But comfortable nasal breathing by day, and undisturbed breathing at night, support efficient oxygen supply and deeper sleep, which your body needs to use energy well and recover.

A simple check: sit quietly and breathe through your nose with your mouth closed for two minutes. If that feels difficult, or one side is always blocked, it is worth having your nose examined.

When should you see an ENT?

You should see an ENT if you snore regularly and have large tonsils or frequent throat infections.

• Seek prompt evaluation for one tonsil that is clearly larger than the other, a lump in the neck, ear pain on one side, or difficulty swallowing. These can occasionally indicate a more serious problem.
• Seek urgent care for severe throat pain with difficulty opening the mouth, drooling or difficulty breathing.
• Breathing pauses or gasping at night.
• Repeated tonsillitis through the year.
• Get evaluated promptly if you feel drowsy while driving.

How an ENT evaluates and treats it

An ENT examines the tonsils, adenoids and the rest of your airway to see how much each contributes to snoring.

The throat examination grades tonsil size. A nasal endoscopy, using a thin camera, checks the back of the nose for adenoid tissue and looks at the septum and turbinates. The palate and tongue base are also assessed, because narrowing often happens at more than one level. An ENT evaluation confirms whether you have simple snoring or sleep apnea.

Treatment depends on the findings. Options may include tonsillectomy, adenoidectomy in selected adults, nasal treatment, positional therapy, an oral appliance or CPAP. When tonsils are the main cause, surgery may lead to a meaningful improvement, though results vary. The right option depends on the cause.

Frequently asked questions

Does nose breathing give me more energy? It does not add energy by itself, but it delivers warm, humidified air and sinus nitric oxide to the lungs, which may help oxygen uptake. Together with better sleep, that supports the energy your body uses at rest (BMR) and during activity.

Is tonsillectomy more difficult for adults than children? Recovery is usually longer and more uncomfortable in adults, often one to two weeks of sore throat. Your surgeon will explain aftercare and warning signs.

Can tonsils grow back? Rarely. Small amounts of tissue can remain.

Do I need surgery if my tonsils are large but I don't snore? Not necessarily. Treatment depends on symptoms such as infections, snoring or apnea, not size alone.

References

• Lundberg JO, Farkas-Szallasi T, Weitzberg E, et al. High nitric oxide production in human paranasal sinuses. Nature Medicine. 1995;1(4):370-373.
• Lundberg JO, Settergren G, Gelinder S, et al. Inhalation of nasally derived nitric oxide modulates pulmonary function in humans. Acta Physiologica Scandinavica. 1996;158(4):343-347.
• Keck T, Leiacker R, Heinrich A, Kühnemann S, Rettinger G. Humidity and temperature profile in the nasal cavity. Rhinology. 2000;38(4):167-171.

About the author

Dr. Prashanth R Reddy is an ENT surgeon at ENTHealth360, Bangalore (MS ENT; MBA, IIM Bangalore; Seoul Rhinoplasty Fellowship), seeing patients at Sakra World Hospital, Marathahalli and in Koramangala. His practice focuses on how breathing affects sleep, energy and everyday performance.

Related reading: Why am I always tired even after 8 hours of sleep? · Why do I wake up tired every morning?

For educational purposes only. Not a substitute for medical advice. Please consult a qualified ENT specialist.