What causes a sore throat with a cough?
- Common cold: sore throat first, then runny nose and cough.
- Flu and COVID-19: sudden fever, aches and fatigue, with sore throat and dry cough.
- Laryngitis: inflamed voice box with hoarseness and a barking or dry cough. See laryngitis.
- Bronchitis: infection of the airways; the cough lasts longer and produces mucus.
- Postnasal drip from allergies or sinus problems. See postnasal drip.
- Acid reflux, which can irritate the throat and trigger a chronic cough.
- Bacterial infections such as strep throat, tonsillitis or whooping cough, less commonly.
- Irritants: smoke, vaping, dry air, pollution and chemicals.
- Medicines such as ACE inhibitors, which cause a dry cough.
The usual story: a virus
Viruses cause most sore throats and coughs. Typical course: day 1–2 scratchy sore throat, day 2–4 runny or blocked nose, mild fever, cough and fatigue, with improvement by day 7–10. A cough may continue for 2–3 weeks after other symptoms resolve, because the airways stay sensitive. Antibiotics do not treat viruses and can cause side effects, so doctors prescribe them only when a bacterial infection is likely. See sore throat remedies.
Dry cough versus wet (productive) cough
- Dry cough: tickly, no mucus; typical early in colds, with irritation, allergies, reflux, laryngitis and ACE inhibitors. Honey, lozenges, humid air and treating the cause help.
- Wet cough: brings up phlegm; common in chest infections and bronchitis. Fluids and steam may help loosen mucus; coughing is helpful, so avoid strong suppressants unless advised.
- Colour of phlegm does not reliably show whether an infection is bacterial or viral; green or yellow mucus is common in viral illness too.
- Barking cough with a hoarse voice suggests croup or laryngitis.
- Whooping or paroxysmal cough with vomiting needs assessment.
Home remedies that help
- Fluids: water, herbal tea, broth; warm drinks soothe the throat.
- Honey (one to two teaspoons, alone or in warm water or tea) can ease cough; do not give to children under 1 year.
- Salt-water gargles several times a day.
- Lozenges or sugar-free sweets (not for young children because of choking).
- Steam or a humidifier to ease dryness; avoid direct hot steam on children.
- Rest and sleep with the head slightly raised.
- Avoid smoke, including second-hand smoke and vaping.
- Pain and fever relief: paracetamol or ibuprofen, following the label.
- Saline nasal rinses if your nose is blocked or you have postnasal drip.
Over-the-counter medicines: what to know
Cough suppressants and expectorants have limited evidence and are not recommended for children under 6 (and many guidelines advise against under 12). Decongestants can raise blood pressure and should be avoided in some conditions. Combination cold medicines often duplicate paracetamol, so check labels to avoid overdose. Throat sprays and lozenges with local anaesthetic provide short-term relief. If you have asthma, heart disease, high blood pressure or take other medicines, ask a pharmacist.
How long does it last?
- Sore throat from a cold: 3–7 days.
- Fever: usually 1–3 days.
- Cough after a cold: up to 3 weeks (sometimes 8 weeks after bronchitis).
- Allergy-related symptoms: as long as exposure continues.
- A cough lasting more than 3 weeks should be assessed; more than 8 weeks is a chronic cough, which needs a work-up (asthma, reflux, postnasal drip, medicines, lung disease).
When a cough doesn’t go away
The most common causes of a persistent cough in non-smokers with a normal chest X-ray are postnasal drip (upper airway cough syndrome), asthma and reflux. Smoking, ACE inhibitors, chronic bronchitis and other lung conditions also cause it. Treatment targets the cause, and a doctor may arrange tests such as a chest X-ray or breathing test. Coughing up blood, weight loss, night sweats, breathlessness or a change in voice warrants prompt assessment.
Children and older adults
Children get 6–8 colds a year and usually recover without treatment. Seek advice for fast or laboured breathing, a barking cough with noisy breathing, refusal to drink, high fever, or a child under 3 months with any fever. Older adults and people with lung or heart disease are at higher risk of pneumonia and should be assessed early if symptoms worsen, particularly with breathlessness or confusion.
When to see a doctor
- High fever (above 39 °C) for more than 3 days, or fever returning after improvement.
- Shortness of breath, wheeze or chest pain.
- Coughing up blood or rust-coloured phlegm.
- Severe sore throat, pus on tonsils, drooling or unable to swallow.
- Symptoms lasting more than 3 weeks.
- Babies, pregnancy, older adults or chronic illness with new symptoms.
- Hoarseness lasting more than 3 weeks, particularly in smokers.
Three common situations
Sore throat for 2 days, now runny nose and tickly cough: a typical cold; fluids, honey and rest.
Cough and sore throat for 4 weeks after a cold: a post-infectious cough is common, but see a doctor if it persists or worsens.
Dry cough and throat clearing every morning with a sour taste: consider reflux or postnasal drip.
Key points to remember
Sore throat with cough is usually viral and settles within 1–2 weeks. Fluids, honey, gargles and rest help; antibiotics do not. Watch for breathing difficulty, chest pain, blood, high persistent fever or symptoms beyond 3 weeks. Our ENT team can assess persistent throat or cough symptoms.
This guide is for general information and does not replace an examination by your own doctor or ENT specialist.
Questions about sore throat and cough
These answers are general information and do not replace an examination or individual medical advice.
What causes a sore throat and cough together?
Most often a cold, flu or COVID-19; allergies, reflux, irritants and bronchitis are other causes.
How can I stop a cough and sore throat fast?
Warm fluids with honey, gargles, lozenges, humid air and rest; nothing cures a virus instantly.
Do I need antibiotics?
Rarely. They do not work on viruses; a doctor prescribes them if a bacterial infection is likely.
How long does a cough last after a cold?
Up to about 3 weeks; see a doctor if it lasts longer.
Is honey effective for cough?
Studies suggest honey eases cough better than no treatment; it is not for babies under 1 year.
When should I worry?
With breathing difficulty, chest pain, coughing blood, high prolonged fever or inability to swallow.
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.