Persistent Sore Throat: Causes, ENT Problems, and When to See a Doctor

You wake up on a Tuesday morning – not to your alarm, but to that raw, scratchy burning at the back of your throat. Fine, you think. It’ll pass. But then it’s Friday, and it’s still there. Then it’s the following Friday. And at some point you stop thinking “this is a cold” and start wondering: what is actually going on?

I’ve seen this scenario play out countless times in ENT practice. Patients come in after two or three weeks of quietly suffering, half-convinced they’re being dramatic. You’re not being dramatic. A sore throat that won’t go away is your body flying a little flag, saying: look closer.

Most ordinary sore throats clear up within 3-7 days. When symptoms stretch beyond that window, something else is driving the problem – chronic tonsillitis, laryngopharyngeal reflux, postnasal drip, allergies, or vocal strain, to name just a few. The good news? Once you find the cause, treatment is usually straightforward. The tricky part is the finding.

Common Causes of a Sore Throat That Won’t Go Away

1 Chronic Tonsillitis

Your tonsils are basically the bouncers of your throat – they filter out bacteria and viruses that come in through the mouth. But sometimes those bouncers get overwhelmed and stay chronically inflamed. Chronic tonsillitis is one of the most common ENT causes of a sore throat lasting weeks. Symptoms include repeated infections (more than 5-7 per year is a red flag), persistent bad breath, and that constant mild soreness that sits at the back of your throat like an unwelcome guest who doesn’t know when to leave.

2 Laryngopharyngeal Reflux (LPR)

Here’s one that surprises most patients: acid reflux can cause a persistent sore throat without ever causing heartburn. This variant – laryngopharyngeal reflux, or LPR – is sometimes called “silent reflux” because stomach acid creeps all the way up to the throat and voice box without producing the classic burning chest sensation. Instead, you get chronic throat clearing, mild hoarseness that’s worst in the morning, and a vague soreness that sits somewhere in the mid-throat. Imagine soaking your throat in a tiny trickle of acid every night while you sleep – which is, give or take, exactly what’s happening.

3 Postnasal Drip

Extremely common, extremely overlooked. When your nose produces excess mucus from a cold, allergies, or chronic sinusitis, a lot of it trickles down the back of your throat continuously, hour after hour. The result is constant irritation, a feeling of something stuck in the throat, and that signature throat-clearing habit. Postnasal drip tends to be worse when lying down, which is why many people wake up with a rough, scratchy throat that improves somewhat as the day goes on.

4 Allergies and Chronic Rhinitis

So many people mistake allergic throat symptoms for recurrent infections. The key difference: allergic sore throats rarely come with fever, they have a seasonal or environmental pattern, and they’re often accompanied by itchy eyes, sneezing, or a runny nose. Dust mites, pet dander, mold, grass pollen – all of these can cause persistent throat irritation through the postnasal drip mechanism. And food allergies, though less common, occasionally cause direct throat inflammation in people with oral allergy syndrome.

5 Chronic Sinusitis

When the sinuses stay infected or inflamed for 12 weeks or more, the result is a steady stream of infected mucus draining into the throat. You’ll usually notice facial pressure, reduced sense of smell, and nasal congestion that just won’t shift. But sometimes the throat is the loudest symptom, and the sinus involvement stays quiet enough to be missed entirely.

6 Vocal Cord Irritation and Overuse

Teachers. Singers. Call centre workers. Anyone who talks intensively for hours each day can develop chronic throat soreness that has nothing to do with infection. It’s the throat equivalent of a repetitive strain injury – completely avoidable, but surprisingly common. And it doesn’t help that most people respond to vocal strain by clearing their throat repeatedly, which actually makes the irritation worse, not better.

Causes at a Glance

Why Is My Sore Throat Worse in the Morning?

A small but telling detail: people with reflux-related morning throat pain often also notice a slightly hoarse or “froggy” voice first thing. That’s the acid effect on the vocal cords. If that sounds familiar, it’s worth mentioning to a doctor.

ENT Causes: A Closer Look

A lot of the causes above are fundamentally ENT problems – they involve structures that fall directly within the ear, nose, and throat specialty. Chronic tonsillitis is managed by ENT surgeons, and when it doesn’t respond to medical treatment, tonsillectomy becomes the most effective long-term solution. Laryngopharyngeal reflux is diagnosed and monitored using laryngoscopy – a thin camera passed through the nose to examine the voice box. Postnasal drip from chronic sinusitis often requires endoscopic sinus surgery when medications fail.

What this means practically: if your sore throat has been going on for more than 3-4 weeks and standard treatments haven’t helped, an ENT referral is the logical next step. Not because something is necessarily alarming – just because these are ENT problems that need ENT tools to properly evaluate.

⚠️ Red Flags: When to Seek Urgent Medical Attention

• ⚠
  Sore throat lasting more than 3 weeks with no clear explanation
• ⚠
  Difficulty swallowing that is getting progressively worse
• ⚠
  Unexplained weight loss alongside throat symptoms
• ⚠
  Persistent hoarseness lasting more than 2-3 weeks
• ⚠
  A lump or swelling in the neck that doesn’t reduce after a few weeks
• ⚠
  Throat pain noticeably worse on one side
• ⚠
  Coughing up blood or visible changes inside the mouth or throat

The vast majority of people with persistent sore throats have completely benign causes. But these particular symptoms – especially in people over 50 with a history of smoking or heavy alcohol use – can occasionally point to something more serious that benefits enormously from early diagnosis.

How ENT Doctors Diagnose a Persistent Sore Throat

Getting to the bottom of a sore throat that won’t go away is genuinely a bit of a detective process. Here’s what a thorough ENT evaluation typically involves:

1. 1
   Clinical ExaminationVisual inspection of the throat, tonsils, and neck lymph nodes. Swollen, pitted tonsils with crypts look very different from a generally inflamed throat.
2. 2
   Flexible LaryngoscopyA thin camera passed through the nose to examine the larynx and back of the throat. Key for diagnosing LPR, vocal cord problems, and structural changes. More tolerable than it sounds.
3. 3
   Throat Swab and CultureTo identify or exclude bacterial infection, particularly if there are signs of tonsillar involvement.
4. 4
   Blood TestsLooking for glandular fever (Epstein-Barr virus), thyroid problems, or other systemic conditions that can manifest as throat symptoms.
5. 5
   pH Monitoring (Reflux Testing)A 24-hour probe measuring acid exposure in the throat. If LPR is suspected but uncertain, this provides a definitive answer.
6. 6
   Allergy TestingSkin prick tests or specific IgE blood tests for common inhalant allergens – particularly when allergic rhinitis with postnasal drip is suspected.
7. 7
   Imaging (CT or MRI)Not always necessary, but used when sinusitis is suspected, a neck mass needs investigation, or deeper structures require evaluation.

Treatment: What Actually Works

The Stomach-Throat Connection: LPR in More Detail

Since LPR catches so many people off guard, it’s worth spending another moment on it. Unlike classic GERD, which produces heartburn and indigestion, laryngopharyngeal reflux often doesn’t cause any obvious stomach symptoms at all. Patients frequently tell me: “But I don’t have acid reflux – I’ve never had heartburn in my life.” And they’re absolutely right. They don’t have GERD. They have LPR, which is a different animal.

The acid in LPR travels past the oesophagus and reaches the larynx and pharynx – areas far more sensitive to acid injury. Even very small amounts of acid exposure can cause significant irritation up there. Symptoms include a persistent sore throat, chronic throat clearing, mild morning hoarseness, and the famous “lump in the throat” sensation that won’t go away no matter how many times you swallow.