Pain When Swallowing: Causes, Relief, and When to See a Doctor

Painful swallowing (clinically called odynophagia) is most often caused by a cold, strep throat, tonsillitis, acid reflux, or a minor throat injury.¹ The pain usually improves in a few days with rest, fluids, and over-the-counter relief. See a doctor if you have a high fever, can’t swallow liquids, are short of breath, or the pain lasts more than a week.

If your throat hurts on one side, read our guide to one-sided throat pain instead. This page covers general painful swallowing — both sides, all sides, or unspecified.

Why It Hurts to Swallow

These are the most common causes, from everyday infections to chronic conditions.

1. Cold or Flu

A sore throat is a common symptom of a cold or sinus infection, and it makes swallowing painful for a day or two before other symptoms catch up.² Typical cold symptoms include:

• Runny nose
• Coughing
• Sneezing
• Headache
• Mild fever and chills
• Earache from pressure behind the eardrum

The flu causes similar symptoms but hits harder and faster.³ Expect a higher fever, body aches, and deep fatigue. Runny nose is less common with the flu than with a cold.

For colds and sinus infections, home remedies (covered below) are usually enough. Contact a doctor promptly if you’re at higher risk for flu complications, very sick, or worried about your symptoms — antiviral medications work best when started within 1 to 2 days.³

2. Strep Throat

Strep is the most common bacterial cause of painful swallowing — and the one that often needs antibiotics.⁴ It comes from group A Streptococcus bacteria, not a virus, which is why over-the-counter cold remedies alone won’t clear it.

Strep typically comes with:

• Fever
• Fatigue
• Swollen lymph nodes in the front of the neck
• Red, swollen tonsils — often with white patches or streaks of pus
• Vomiting (in young children)

A doctor confirms strep with a rapid antigen test or a throat swab culture.⁴ Antibiotics shorten the illness, lower the risk of complications like rheumatic fever, and reduce how long you’re contagious.⁵

3. Mononucleosis

Mononucleosis (“mono”) is a viral infection most commonly caused by the Epstein-Barr virus (EBV).⁶ A painful sore throat is one of its hallmark early symptoms, often paired with extreme fatigue and swollen lymph nodes that linger for weeks.

Common symptoms include:

• Sore throat
• Fever
• Swollen lymph nodes
• Severe fatigue
• Swollen liver or spleen (in more severe cases)

EBV spreads through saliva, and symptoms can take several weeks to appear after infection.⁶ Most people improve within 2 to 4 weeks with rest, fluids, and over-the-counter pain relief, though fatigue lingers longer. Skip contact sports until your doctor clears you — mono can enlarge the spleen, and a hit to the abdomen can rupture it.⁶

4. Tonsillitis

Tonsillitis swells the tonsils on both sides of the back of the throat, making swallowing painful and often producing a visible white or yellow coating.⁷ Most cases come from viruses, but strep and other bacteria cause some.

Signs include:

• Sore throat and trouble swallowing
• Visibly swollen tonsils, often red or spotted
• Fever
• Swollen lymph nodes in the neck

Viral tonsillitis resolves in about a week with rest and OTC pain relief.⁷ Bacterial tonsillitis needs antibiotics.

5. Acid Reflux (GERD)

Acid reflux can cause a sore throat and painful swallowing when stomach acid flows back up into your esophagus and irritates the lining.⁸ It also brings the more familiar heartburn and acidic taste.

Occasional reflux is normal. If it happens twice a week or more, your doctor may diagnose gastroesophageal reflux disease (GERD).⁸ Other GERD symptoms include:

• Nausea
• Chest pain or pressure — get urgent care for new, severe, or unexplained chest pain, especially with shortness of breath, sweating, nausea, lightheadedness, or pain spreading to the arm, jaw, neck, or back
• Globus sensation — feeling a lump in your throat when nothing is there
• Excess saliva

Treatment usually starts with lifestyle changes (smaller meals, avoiding trigger foods, no late-night eating) and over-the-counter or prescription acid-reducing medication.⁹ Surgery is reserved for severe cases that don’t respond to medication.

6. Throat Injury

Pills that stick to the back of the throat and sharp pieces of food can scratch the esophagus, causing pain that fades within a day or two. Drink a full glass of water with every pill — staying upright for 30 minutes afterward helps the pill clear.¹⁰

If pain persists for more than a few days after a pill or food injury, see a doctor. The esophagus may be inflamed (esophagitis), and the area can sometimes need treatment.¹⁰

7. Allergies

Allergic reactions trigger throat swelling and mucus that can make swallowing feel tight or painful. Seasonal allergies usually cause postnasal drip and mild irritation rather than true painful swallowing.

A severe allergic reaction is different. If your throat feels like it’s closing, you have trouble breathing or swallowing, or your lips and tongue swell, call 911 — these are signs of anaphylaxis and need emergency epinephrine.¹¹

8. COVID-19

A sore throat is one of the more common COVID-19 symptoms, and it can make swallowing painful even when other symptoms are mild.¹² Because flu and COVID-19 look similar, a test is the only reliable way to tell them apart.

COVID-19 symptoms commonly include:

• Sore throat
• Fever or chills
• Cough
• Fatigue
• Muscle or body aches
• Headache
• Loss of taste or smell
• Congestion or runny nose

Test if you have symptoms or a known exposure. If you have symptoms, stay home until they’re improving and you’ve been fever-free for 24 hours, then take added precautions for 5 days. If you test positive without symptoms, take added precautions for 5 days. Contact your doctor promptly if you’re at higher risk for severe illness.¹²

Other Causes

Less common causes of painful swallowing include:

• Herpes simplex virus — causes painful blisters and ulcers in or around the mouth¹³
• Oral thrush — a yeast infection that can spread from the mouth into the throat¹⁴
• Esophagitis — irritation of the esophagus from GERD, medications, infection, or allergies¹⁰
• Eosinophilic esophagitis — an allergy-driven inflammation of the esophagus that often causes food sticking and painful swallowing¹⁵
• Throat or esophageal cancer — persistent painful or difficult swallowing should be evaluated, especially alongside weight loss, hoarseness, bleeding, or a lump in the neck¹⁶
• Side effects of chemotherapy or radiation therapy¹⁷

Treatment Options and Outlook

Treatment depends on the cause. Most viral infections clear on their own with rest, fluids, and over-the-counter pain relief. Bacterial infections — strep being the most common — need antibiotics.⁴

Other treatments your doctor might prescribe include:

• Antihistamines for mild allergy symptoms like postnasal drip or itching — not for anaphylaxis, which needs emergency epinephrine for throat tightness, trouble breathing or swallowing, or lip and tongue swelling¹¹
• Antifungal medication for oral thrush¹⁴
• Acid reducers (H2 blockers or proton pump inhibitors) for GERD⁹
• Tonsil removal for severe, recurring tonsillitis — usually in children⁷
• Prescription pain medication for more serious causes

For most people, time, rest, and fluids resolve painful swallowing within a week or two. Talk to your doctor if your symptoms are severe, getting worse, or lasting longer than expected.

How a Doctor Diagnoses Painful Swallowing

Your doctor will start with your symptoms and a physical exam, then choose tests based on what they suspect.

Throat Swab

A throat swab collects cells from the back of your throat to check for bacteria such as group A strep.¹⁸ A rapid antigen test gives results in minutes; a culture takes 1 to 2 days, is more sensitive, and is the recommended follow-up after a negative rapid test in symptomatic children older than 3.⁴

Blood Test

Blood tests can show signs of infection or inflammation and may help guide the workup — for example, by detecting EBV antibodies for suspected mono or signs of a broader systemic infection.

Upper Endoscopy (EGD)

Upper endoscopy uses a thin flexible camera passed through the mouth to look directly at the esophagus, stomach, and upper small intestine.¹⁹ Your doctor may order it when symptoms suggest GERD complications, esophagitis, a structural cause of painful swallowing, or reflux that hasn’t improved with treatment. They can also take a small tissue sample (biopsy) during the procedure.

Barium Swallow

A barium swallow (esophagogram) is an X-ray that shows the inside of your throat and esophagus while you swallow a chalky liquid.²⁰ It evaluates swallowing function and highlights structural issues like strictures or pouches.

CT Scan

A CT scan creates a cross-sectional image of your throat and neck and helps your doctor look for abscesses, masses, or other abnormalities that don’t show up on plain imaging.

Home Remedies for Throat Pain Relief

If your swallowing pain is mild or just starting, try these at home before reaching for prescription care. CDC-recommended sore-throat remedies include OTC pain medicine, salt water gargling, popsicles, warm beverages, honey, and a humidifier.²¹

Pain Medication

NSAIDs like ibuprofen and naproxen (Aleve) reduce inflammation, swelling, and pain. Acetaminophen (Tylenol) is not an NSAID but also relieves pain. Follow the label, and check with your doctor before using them if you have chronic kidney, liver, or stomach conditions.

Antacids

Over-the-counter antacids neutralize stomach acid and ease the reflux-related sore throat that comes with GERD. H2 blockers and proton pump inhibitors work better for ongoing reflux.⁹

Throat Sprays

OTC throat sprays numb the back of the throat for short-term relief, making it easier to swallow food and liquids.

Saltwater Gargling

Salt water reduces inflammation and offers mild pain relief.²¹ Mix half a teaspoon of salt in a glass of warm water and gargle a few times a day.

Warm Beverages

Warm tea, broth, or water soothes a raw throat. Adding honey and lemon helps further — but never give honey to children under 1 year old because of the risk of infant botulism.²¹

Cold Foods

Cold foods like popsicles, smoothies, or ice cream often soothe acute throat pain — especially after tonsillitis or a sharp throat injury.²¹ Stop if anything you eat or drink makes the pain worse.

Humidifier or Warm Shower

A clean cool-mist humidifier loosens nasal and chest congestion and eases throat dryness.²¹ A warm shower works too, and it also helps with the muscle aches and chills that come with a cold or flu. Keep hot steam and steam vaporizers away from children — the hot water can cause burns.

Avoid Throat Irritants

Steer clear of things that make a sore throat worse:

• Alcohol
• Smoking and vaping
• Hot or spicy foods
• Hard or rough foods like chips and crackers

Stick to fluids and soft foods until swallowing feels normal again.

When to See a Doctor

Most cases of painful swallowing improve within a few days. Some don’t — and a few signal something that needs prompt care.

See a doctor if you:

• Have pain that lasts more than a week or keeps getting worse
• Run a high fever (above 101°F / 38.3°C)
• Can’t swallow liquids or your own saliva
• Have trouble breathing or opening your mouth
• Notice swollen lymph nodes that don’t ease after a few days
• Cough up or vomit blood
• Have no other symptoms but persistent pain

Call 911 or go to the emergency room if your throat feels like it’s closing, you can’t breathe, or your lips and tongue swell suddenly. Those are signs of anaphylaxis or airway swelling and need emergency care.¹¹

In Short

Most painful swallowing comes from common, treatable causes — colds, strep, tonsillitis, mono, COVID-19, reflux, or minor throat injuries. Home remedies, rest, and time resolve the majority of cases within a week or two.

See a doctor if your pain is severe, getting worse, or paired with high fever, breathing trouble, or trouble swallowing liquids. Targeted treatment — antibiotics for strep, acid reducers for GERD, antifungals for thrush — clears most causes that need it.