Dry Throat: Causes, Remedies and When to See a Doctor

Why is my throat dry?

Mouth breathing, particularly at night with a blocked nose, snoring or sleep apnoea.
Dry indoor air: central heating, air conditioning, low humidity in winter.
Dehydration: not enough fluids, sweating, fever, diarrhoea or hot weather.
Allergic rhinitis and postnasal drip.
Smoking, vaping and alcohol, which irritate and dry the lining.
Medicines: antihistamines, decongestants, some antidepressants, blood pressure tablets, diuretics and others reduce saliva.
Reflux (including LPR): acid irritation can feel like dryness and throat clearing.
Voice overuse and shouting.
Medical conditions: Sjögren’s syndrome, diabetes, anxiety, radiotherapy to the head and neck.

Why is it worse in the morning?

Saliva production drops during sleep, and if you sleep with your mouth open because of nasal blockage, a deviated septum, snoring or sleep apnoea, the air dries the throat further. Waking with a very dry mouth and throat, loud snoring, pauses in breathing or daytime sleepiness suggests it is worth checking for sleep apnoea. See snoring remedies (Spanish) or snoring remedies.

Remedies that help

Drink water regularly through the day; keep a glass by the bed.
Use a humidifier in the bedroom (clean it as directed), aiming for 40–50% humidity.
Breathe through your nose: treat congestion with saline rinses or sprays; ask about allergy treatment.
Suck sugar-free lozenges or chew sugar-free gum to stimulate saliva.
Avoid smoking, alcohol-based mouthwashes, heavy caffeine and alcohol.
Honey in warm water or tea soothes a scratchy throat (not for babies under one year).
Saliva substitutes or sprays for persistent dry mouth, as advised by a pharmacist or dentist.
Rest your voice if it has been overused.

Review your medicines

Hundreds of medicines list dry mouth as a side effect. Do not stop a medicine on your own, but if you think a tablet is responsible, ask your doctor or pharmacist whether the dose can be changed, the timing adjusted or an alternative used. Taking a sedating antihistamine every night, for example, is a frequent reason for waking with a dry mouth.

Dryness from reflux

Laryngopharyngeal reflux can feel like a dry, irritated throat with constant throat clearing, hoarseness and a sensation of a lump, sometimes without heartburn. Eating smaller meals, avoiding food within three hours of bedtime, cutting back on coffee, alcohol, chocolate and fatty food, quitting smoking and raising the head of the bed are the first steps. See LPR.

Dry throat with dry eyes: Sjögren’s syndrome

Sjögren’s syndrome is an autoimmune condition in which the glands that make saliva and tears are attacked. It causes a persistently dry mouth and throat, dry or gritty eyes, difficulty swallowing dry food, frequent tooth decay and sometimes joint pain and fatigue. It is more common in women over 40. If this sounds familiar, speak to your doctor, who can arrange blood tests and refer you to a specialist.

When to see a doctor

Dry throat for more than 3–4 weeks despite home measures.
Hoarseness for more than 4 weeks, or difficulty or pain when swallowing.
Dry mouth with dry eyes, tooth decay or joint pain.
Excessive thirst and frequent urination (possible diabetes).
Snoring with breathing pauses or heavy daytime sleepiness.
A neck lump, weight loss or coughing blood.

Three common situations

Dry throat only when you wake up, with a blocked nose: treat the nose, add humidity and keep water by the bed.

Dry throat since starting a new tablet: ask your doctor or pharmacist about the medicine.

Dry throat for two months with throat clearing and hoarseness: arrange an ENT assessment to look at the voice box and discuss reflux and other causes.

Foods and drinks that help or hurt

Water-rich foods (cucumber, melon, soups, yoghurt) and regular sips of fluid help. Warm herbal teas with honey soothe, while very salty, spicy or crunchy foods (crisps, toast) can scratch an already irritated throat. Alcohol and caffeine have a diuretic effect, and carbonated or citrus drinks may bother a sensitive throat. If you take sugar-containing lozenges, brush your teeth, because dry mouth increases the risk of tooth decay.

Dry throat and voice care

A dry throat makes the voice tire quickly. Teachers, singers and call-centre workers should drink water regularly, rest the voice when possible, avoid whispering and shouting, and avoid throat clearing. Steam inhalation can provide short-term comfort. If hoarseness lasts more than four weeks, an ENT examination of the vocal folds is recommended.

Key points to remember

A dry throat is usually due to dryness, mouth breathing or allergy, and it improves with fluids, humidity and treating the cause. Persistent dryness, hoarseness or swallowing difficulty should be checked by a doctor or ENT specialist.

This guide is for general information and does not replace an assessment by your own doctor or ENT specialist.

Questions about a dry throat

These answers are general information and do not replace an examination or individual medical advice.

Why does my throat feel dry at night?

Saliva decreases during sleep, and mouth breathing from a blocked nose, snoring or sleep apnoea dries the throat further.

What is the best remedy for a dry throat?

Drink water, humidify the bedroom, breathe through the nose and avoid smoke and alcohol. Lozenges and honey soothe temporarily.

Can dehydration cause a dry throat?

Yes, especially with fever, sweating or hot weather.

Can medicines cause dry throat?

Yes. Antihistamines, some antidepressants, diuretics and many others can reduce saliva.

Is a dry throat a sign of Covid or a cold?

It can be an early sign of viral infections, usually with other symptoms such as runny nose, cough or fever.

When is a dry throat serious?

If it lasts more than 3–4 weeks, or comes with hoarseness, swallowing difficulty, a neck lump or weight loss.

Sources

This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.