Sore Throat That Will Not Go Away: Causes and When to Worry
A sore throat for a week, two weeks or longer — what persistence actually means, what to rule out, and when to get assessed.
Part of our Sore Throat condition guide.
Key fact: Most sore throats clear within a week. Persistence is usually explained by a slow-clearing virus, glandular fever, or an ongoing irritant such as reflux or smoking — not by a missed bacterial infection needing antibiotics.
Get Assessed for a Persistent Sore Throat
Access Doctor is a UK online doctor and GPhC-registered pharmacy. A pharmacist independent prescriber will review your symptoms online without a GP appointment and advise on treatment, or tell you when you need in-person assessment instead.
View Sore Throat Treatments →How long is too long for a sore throat?
Some useful benchmarks, because "too long" depends on what you are comparing against.
| Duration | What it usually means | What to do |
|---|---|---|
| 1–3 days | Normal early course of a viral sore throat | Self-care and regular pain relief |
| 3–5 days | Should be improving by now | Continue self-care; review if worsening |
| Around 1 week | Most sore throats have resolved | Get assessed if no improvement at all |
| 2 weeks | Longer than typical. Glandular fever is a common explanation | Arrange a clinical assessment |
| 3 weeks or more | Always warrants review, whatever the suspected cause | See a GP promptly, particularly if you smoke or drink heavily |
3–4 days
when most sore throats start improving
1 week
typical full resolution
3 weeks
threshold for prompt clinical review
Sore throat for a week
At the one-week mark, the most likely explanation is still benign: a viral infection clearing more slowly than average. Some viruses, particularly adenovirus, routinely produce throat symptoms lasting seven to ten days.
Before assuming something is wrong, check whether you have actually been treating it properly. A surprising number of week-long sore throats are under-treated rather than unusual — occasional paracetamol rather than regular full-dose pain relief, continued smoking, or dehydration.
- Have you taken pain relief regularly at the full dose, or only occasionally?
- Are you still smoking or vaping?
- Are you drinking enough fluid through the day?
- Is your nose blocked, causing mouth breathing overnight?
- Is the air where you sleep very dry?
If all of those are addressed and there is still no improvement after a week, that is the point to get assessed rather than continue waiting.
Sore throat for 2 weeks or more
Two weeks moves beyond the normal course of a simple viral sore throat. It is not automatically worrying — glandular fever alone accounts for a large share of these cases in teenagers and young adults — but it does mean self-management has run out of road.
At this stage a clinician will want to establish whether this is one continuous illness or several overlapping ones, whether there is an ongoing irritant, and whether there are any features suggesting something that needs specific investigation.
Diagnosis first: A persistent sore throat is a symptom with many possible causes, several of which are not infections at all. Repeating antibiotics or escalating self-treatment without a diagnosis is the wrong response. What you need at this point is an assessment.
Causes of a persistent sore throat
Infections
- Slow-clearing viral infection — the most common explanation at one to two weeks
- Glandular fever — throat pain commonly lasts two to three weeks, with profound fatigue
- Overlapping infections — catching a second virus before the first has cleared, common in households with young children
- Untreated bacterial infection — less common, but possible if there are fever, tonsillar pus and swollen glands
- Oral thrush — particularly after antibiotics or inhaled steroid use
Irritants and non-infectious causes
- Acid reflux — frequently missed, covered in detail below
- Smoking and vaping — continuous chemical irritation of the throat lining
- Allergic rhinitis and post-nasal drip — mucus running down the back of the throat causes chronic irritation
- Dry air — central heating and air conditioning, especially overnight
- Mouth breathing — from nasal obstruction or sleep apnoea
- Voice overuse — teachers, singers, call centre workers
- Inhaled steroid inhalers — can cause throat irritation and thrush if not rinsing after use
- Chronic tonsillitis or tonsil stones — recurrent low-grade inflammation
Less common causes
- Globus sensation — a feeling of a lump or tightness, often tension-related
- Thyroid inflammation — subacute thyroiditis can present with neck and throat pain
- Medication side effects — some drugs cause dry mouth and throat irritation
- Mouth or throat cancer — uncommon, but the reason a sore throat lasting beyond three weeks always warrants review, particularly with smoking or heavy alcohol use
Acid reflux: the commonly missed cause
Laryngopharyngeal reflux, sometimes called silent reflux, is one of the most frequent explanations for a sore throat that simply will not resolve — and it is regularly missed because people expect reflux to mean heartburn.
In this pattern, stomach acid travels past the oesophagus into the throat and voice box. The tissue there has no protection against acid, so even small amounts cause persistent irritation. Classic heartburn may be entirely absent.
Worse in the morning
Lying flat overnight allows acid to travel upwards, so symptoms peak on waking.
Hoarse voice
Acid irritation of the vocal cords causes hoarseness that fluctuates through the day.
Constant throat clearing
A persistent urge to clear the throat, which then irritates it further.
Lump in the throat
A sensation of something stuck, without any difficulty actually swallowing food.
Chronic cough
A dry cough that has no obvious chest cause and persists for weeks.
No heartburn
Many people with laryngopharyngeal reflux never experience classic burning at all.
If this pattern fits, it is worth raising specifically with a clinician, since the treatment is entirely different from that for an infection.
Glandular fever
Infectious mononucleosis, caused by the Epstein-Barr virus, is a leading cause of prolonged sore throat in teenagers and young adults. The throat pain is often severe and can last two to three weeks, well beyond a typical viral sore throat.
Suggestive features are profound fatigue that persists for weeks or months, markedly swollen glands in the neck and elsewhere, heavy exudate on very enlarged tonsils, and sometimes an enlarged spleen or liver. Diagnosis is confirmed by a blood test.
Two practical points. First, amoxicillin causes a widespread itchy rash in a large proportion of people with glandular fever, which is why UK guidance avoids it for sore throat — see our guide to the best antibiotic for a sore throat. Second, if the spleen is enlarged, contact sports and heavy lifting should be avoided for several weeks because of the risk of splenic rupture.
Does persistence mean you need antibiotics?
Usually not, and this is the most common misconception about a lingering sore throat.
Duration is not a marker of bacterial infection. Bacterial sore throats do not typically last longer than viral ones — if anything, streptococcal throat infection tends to be sharply acute and self-limiting. The features that suggest a bacterial cause are high fever, pus on the tonsils, tender swollen neck glands and the absence of cough, which our guide on sore throat vs strep throat covers in detail.
If you have already completed a course of antibiotics and the sore throat has not resolved, taking a second course is rarely the answer. That pattern points towards a viral cause, an irritant, or something requiring a different kind of assessment.
Recurring rather than persistent
It is worth distinguishing a sore throat that never goes away from one that keeps coming back, because the causes and the management differ.
Recurrent episodes with clear well periods in between suggest repeated infections, chronic tonsillitis, or an environmental trigger with a pattern. Keeping a simple diary of dates and severity is genuinely useful here — it is what a GP needs to judge whether tonsillectomy referral criteria are met, and recollection alone is rarely precise enough.
UK referral criteria are seven or more disabling episodes in one year, five or more per year for two years, or three or more per year for three years. Our tonsillitis guide covers this in more detail.
Red flags that need prompt assessment
These warrant a GP appointment without delay, rather than watchful waiting.
- Sore throat lasting more than three weeks
- A lump in the neck that persists
- Hoarse voice lasting more than three weeks
- Difficulty or pain on swallowing that is progressing
- Unexplained weight loss
- Persistent one-sided throat or ear pain
- Unexplained mouth ulcer lasting more than three weeks
- Coughing up blood
- Night sweats or unexplained fevers over weeks
- Any of the above alongside a history of smoking or heavy alcohol use
These features do not mean something serious is present — most turn out to have benign explanations. They mean the situation should be looked at properly rather than managed at home.
What to do next
1
Check you have actually treated it properly
Regular full-dose pain relief, no smoking, good hydration, benzydamine spray. Under-treatment is a common reason a sore throat feels endless.
2
Look for an ongoing irritant
Reflux, allergies, dry air, mouth breathing, voice overuse, inhaler technique. Removing the driver matters more than treating the throat.
3
Note the pattern
Continuous or recurring? Worse in the morning or the evening? Any hoarseness, cough or reflux symptoms? This detail shapes the diagnosis.
4
Check for red flags
Neck lump, hoarseness beyond three weeks, weight loss, progressive swallowing difficulty. Any of these means prompt GP review.
5
Get assessed rather than self-treating further
Beyond a week without improvement, the useful next step is a clinical opinion, not another remedy or a repeat antibiotic.
Get a Clinical Assessment Online
If your sore throat has features suggesting a bacterial infection, a GPhC-registered pharmacist independent prescriber can review your symptoms online in the UK without a GP appointment and prescribe where appropriate. Where your symptoms need in-person examination instead, we will tell you.
Start Sore Throat Consultation →When to get urgent help
Call 999 or go to A&E if there is difficulty breathing, a high-pitched noise when breathing, drooling or inability to swallow saliva, inability to open the mouth properly, or severe one-sided throat pain with a muffled voice.
Contact NHS 111 or your GP the same day for a very high temperature you cannot control, rapidly worsening symptoms, or if you have a weakened immune system, are having chemotherapy, or take medicines that suppress immunity.
Frequently Asked Questions
Why is my sore throat not going away?
The most common reasons are that a viral infection is simply taking longer than average to clear, that an ongoing irritant such as smoking, acid reflux, allergies or dry air keeps re-inflaming the throat, or that the original cause was never a straightforward cold. Glandular fever is a frequent explanation in teenagers and young adults, since it commonly causes throat pain lasting two to three weeks. Less often, a persistent sore throat reflects an untreated bacterial infection or a developing complication.
How long is too long for a sore throat?
Most sore throats improve within three to four days and clear within a week. A sore throat lasting beyond one week without improvement is worth having assessed. A sore throat lasting more than three weeks should always be reviewed by a clinician, and NHS guidance treats persistent throat symptoms beyond three weeks as a reason for urgent assessment, particularly in people who smoke or drink heavily.
I have had a sore throat for 2 weeks. Should I worry?
Two weeks is longer than typical but is not automatically alarming, and glandular fever is a common explanation in younger adults. It does mean self-treatment has run its course and you should be assessed rather than continuing to wait. Seek review sooner if you also have a persistent lump in the neck, difficulty or pain on swallowing that is worsening, a hoarse voice lasting more than three weeks, unexplained weight loss, night sweats, or if you smoke or drink heavily.
Can acid reflux cause a persistent sore throat?
Yes, and it is a commonly missed cause. When stomach acid travels up beyond the oesophagus into the throat, a pattern called laryngopharyngeal reflux, it irritates the throat lining and produces a chronic sore or scratchy throat. The clues are that symptoms are often worse in the morning, accompanied by a hoarse voice, frequent throat clearing, a sensation of a lump in the throat, or a persistent cough. Classic heartburn may be completely absent.
Does a sore throat that will not go away mean I need antibiotics?
Not usually. Persistence on its own is not evidence of bacterial infection, and most long-lasting sore throats are viral or driven by an irritant that antibiotics cannot address. An antibiotic is considered where there are specific features of bacterial infection such as high fever, pus on the tonsils, swollen tender neck glands and no cough. If a completed antibiotic course has already failed to help, taking another is rarely the answer and reassessment is needed instead.
Can stress or anxiety cause a persistent sore throat?
Indirectly, yes. Anxiety can produce a sensation of tightness or a lump in the throat, known as globus sensation, caused by muscle tension rather than inflammation. It can feel like a sore throat that never resolves. Stress also increases habits that irritate the throat, such as frequent throat clearing, and can worsen acid reflux. Globus is a diagnosis reached after other causes have been considered, so it should not be assumed without assessment.
When should I see a doctor about a sore throat that will not go away?
Book a routine appointment if your sore throat has lasted more than a week without improvement, keeps recurring, or is not responding to regular pain relief. Seek urgent same-day help for difficulty breathing or swallowing, drooling, inability to open the mouth, or severe one-sided pain with a muffled voice. Arrange prompt assessment for any sore throat lasting more than three weeks, an unexplained neck lump, a hoarse voice beyond three weeks, or unexplained weight loss.
Completing the treatment
While you arrange assessment, effective symptom relief still matters. Access Doctor supplies benzydamine sprays and rinses, and prescription antibiotics where a bacterial cause is identified, after a short online consultation reviewed by a GPhC-registered pharmacist independent prescriber. No GP appointment is needed and orders are dispensed from our UK pharmacy. See the full range on the sore throat treatment page.
Pain relief · P
Difflam Sore Throat Spray
Benzydamine spray for ongoing relief while the cause is investigated.
View product →Pain relief · P
Difflam Oral Rinse
Gargle formulation for wider coverage of a chronically irritated throat.
View product →Antibiotic · Rx
Phenoxymethylpenicillin 250mg
Where assessment identifies a bacterial cause.
View product →Antibiotic · Rx
Clarithromycin 500mg
Alternative where there is penicillin allergy.
View product →References
- NHS. Sore throat. nhs.uk
- NICE Clinical Knowledge Summaries. Sore throat – acute. cks.nice.org.uk
- NICE. Suspected cancer: recognition and referral (NG12). nice.org.uk
- NHS. Glandular fever. nhs.uk
- NICE Clinical Knowledge Summaries. Gastro-oesophageal reflux disease. cks.nice.org.uk
- NHS. Hoarseness and voice problems. nhs.uk
- National Institute for Health and Care Excellence. Sore throat (acute): antimicrobial prescribing (NG84). nice.org.uk
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment. In a medical emergency, call 999.