Swollen tonsils are usually visible to the naked eye. Each healthy tonsil is roughly the size of a marshmallow, sitting on either side of the back of your throat. When they’re inflamed, they look noticeably larger, redder than the surrounding tissue, and may have white, yellow, or gray patches on their surface. You can check at home with a mirror and a light source in under a minute.
How to Check Your Tonsils at Home
Start by drinking some water or rinsing your mouth to clear away any food particles. Then stand in front of a mirror in a well-lit room, or use a flashlight (your phone’s light works fine). Open your mouth wide, stick out your tongue, and look at the back of your throat. Your tonsils sit about midway down, one on each side. Saying “aaaahh” flattens the back of your tongue and gives you a much better view.
Healthy tonsils are pinkish, roughly symmetrical, and blend in with the surrounding throat tissue. They may have small pits or crevices on the surface, which is normal. If they look obviously red, puffy, or are bulging toward the center of your throat, they’re likely swollen.
What Swollen Tonsils Look Like
The most reliable visual signs are redness and enlargement. Swollen tonsils appear darker red than the tissue around them and look like they’ve expanded to take up more of your throat. In mild cases, they may block about 25% of the airway. In severe cases, they can obstruct 75% or more of the space, nearly touching each other in the middle (sometimes called “kissing tonsils”).
Coatings and spots are another giveaway. You might see white or yellow patches, a grayish film, or scattered spots across the tonsil surface. These are signs of infection and often accompany the swelling. Not every case of swollen tonsils produces these patches, but when they’re present, the diagnosis is more obvious.
Tonsil Stones vs. Infection
White spots don’t always mean infection. Tonsil stones are small, firm, white or yellowish bumps that lodge in the crevices of your tonsils. They’re made of trapped bacteria, dead cells, food debris, and saliva. The key difference: tonsil stones are discrete, solid-looking bumps that sit in pits on the tonsil surface, while infectious patches tend to look more like a coating or film spread across the tonsil. Tonsil stones also usually cause bad breath without much throat pain, while infected tonsils are painful and red.
Physical Symptoms That Confirm Swelling
Visual inspection tells you a lot, but the physical symptoms fill in the rest of the picture. Swollen tonsils typically cause pain when swallowing, which can range from mild scratchiness to sharp pain that makes eating difficult. Your voice may sound muffled or slightly different, as if you’re talking with something stuck in your throat.
Check for swollen lymph nodes by gently pressing along the front of your neck, just below the jawline. Tender, marble-sized lumps there are a common companion to tonsil inflammation. You might also notice ear pain on one or both sides, even though nothing is wrong with your ears. The tonsils and ears share nerve pathways, so tonsil inflammation can create referred pain. Fever, headache, and general fatigue round out the typical set of symptoms.
Viral vs. Bacterial: How to Tell the Difference
Most swollen tonsils are caused by a virus, but bacterial infections (especially strep throat) need different treatment. There are some reliable patterns that help you tell them apart, though a throat swab is the only way to know for certain.
Bacterial tonsillitis, particularly from group A strep, tends to come on suddenly. It commonly presents with fever, significant pain when swallowing, swollen lymph nodes at the front of the neck, and red tonsils that may have white or yellow patches. Tiny red spots on the roof of the mouth (called palatal petechiae) are another clue pointing toward strep. The important detail: strep throat typically does not come with a cough, runny nose, hoarseness, or pink eye. If you have those symptoms, a virus is the more likely cause.
Viral tonsillitis often arrives alongside classic cold symptoms: congestion, coughing, a hoarse voice, or watery eyes. It tends to build gradually rather than hitting all at once. When these viral symptoms are clearly present, testing for strep is generally unnecessary.
Signs of Swollen Tonsils in Children
Young children can’t always describe a sore throat, so you’ll need to watch for indirect signs. A child with swollen tonsils may refuse food, drool more than usual, or seem unusually fussy. Trouble swallowing is a big one, and you might notice them wincing or crying when they try to eat or drink.
The more telling signs show up at night. Enlarged tonsils narrow the airway, so snoring is common, even in children who don’t normally snore. Some children develop sleep apnea, where breathing repeatedly pauses for a few seconds during sleep. If your child breathes through their mouth during the day, sleeps restlessly, or seems unusually tired despite a full night’s sleep, enlarged tonsils could be the reason. Children with an enlarged adenoid (the tissue behind the nose that’s related to tonsils) may also develop a nasal-sounding voice and get more frequent ear infections.
How Long Swelling Typically Lasts
Viral tonsillitis usually resolves on its own within 7 to 10 days. The worst of the swelling and pain tends to peak around days two through four, then gradually improves. Bacterial tonsillitis treated with antibiotics generally starts improving within 48 to 72 hours, though you should finish the full course of medication.
If your tonsils stay swollen for more than two weeks, the swelling is only on one side, you’re having trouble breathing, or you can’t swallow liquids, those are signs that something more serious may be going on. Difficulty breathing or an inability to swallow warrants immediate medical attention, as a peritonsillar abscess or severe airway obstruction can develop in rare cases.