Swollen tonsils are usually visible when you open your mouth wide in front of a mirror. Healthy tonsils are small, pink, and tucked behind the arches of tissue on either side of your throat. When they’re swollen, they appear noticeably larger, redder, and may bulge toward the center of your throat. In some cases, you’ll also see white or yellow patches on their surface.
How to Check Your Tonsils at Home
You can get a good look at your tonsils with a mirror and a light source. A phone flashlight works well. Open your mouth as wide as possible, then push your tongue flat against the bottom of your mouth or stick it straight out. Saying “aaaahh” drops the back of your tongue and opens up your view of the throat.
Your tonsils sit on either side of the back of your throat, just behind the soft arches of tissue that frame the opening. When they’re their normal size, they may barely peek out from behind those arches. When they’re swollen, they push forward and can take up a significant portion of the space in the back of your throat. In severe cases, the two tonsils nearly touch each other in the middle.
What Swollen Tonsils Look Like
The clearest sign is size. Doctors grade tonsil enlargement on a scale from 1 to 4. At grade 1, the tonsils are mostly hidden behind the tissue arches. At grade 2, they extend past the arches and block 25 to 50% of the airway space. Grade 3 tonsils push further out and occupy up to 75% of that space. At grade 4, they take up more than 75% and may nearly meet in the middle.
Beyond size, look for these visual changes:
- Color: Swollen tonsils typically turn a deeper red than the surrounding tissue.
- Coating: A white, yellow, or grayish film covering part or all of the tonsil surface.
- White spots or patches: Distinct patches of pus or debris sitting on the tonsils.
- Asymmetry: One tonsil noticeably larger than the other, which can signal an abscess or other issue that needs prompt attention.
Symptoms That Confirm the Swelling
Sometimes you can’t get a clear visual, especially if your gag reflex kicks in. In those cases, several other symptoms point to swollen tonsils. A sore throat, particularly one that hurts more when you swallow, is the most common. You may also notice a scratchy or muffled quality to your voice, bad breath that wasn’t there before, or pain that seems to radiate into your ears. That ear pain isn’t a separate infection. The tonsils and ears share nerve pathways, so inflammation in one area can produce pain in the other.
Check the lymph nodes along the sides of your neck, just below the jaw and in front of the large muscle that runs from behind your ear toward your collarbone. During tonsil infections, these nodes often swell and feel tender to the touch. Nodes larger than about 2 centimeters (roughly the width of a nickel) alongside a sore throat and fever of 101°F or higher are a strong indicator of a significant infection.
Normal Tonsil Size Varies by Age
Before you worry, keep in mind that tonsils are naturally larger in children than in adults. They grow steadily through childhood, peaking in size around ages 10 to 14, then gradually shrinking. A child whose tonsils look prominent isn’t necessarily dealing with an infection. In kids aged 5 to 9, a healthy tonsil averages just over 1 centimeter across and about 1.4 centimeters long. By the teen years, they’re slightly larger at roughly 1.4 centimeters wide and 1.7 centimeters long.
What matters more than absolute size is whether the tonsils have changed. If your child’s tonsils have always been visible but they’re eating, sleeping, and breathing normally, that’s likely their baseline. If they’ve suddenly become larger, redder, or coated in white patches, that’s swelling worth investigating.
Bacterial vs. Viral: How the Appearance Differs
Most sore throats with swollen tonsils are caused by viruses and resolve on their own. Bacterial infections, particularly strep throat, tend to produce a few distinguishing features. White pus on the tonsils and tiny red dots (called petechiae) scattered across the roof of the mouth are classic signs that clinicians look for when suspecting strep.
One complication: the virus that causes mono (Epstein-Barr) closely mimics strep throat. Both cause intense inflammation and white buildup on the tonsils, making them nearly impossible to distinguish by sight alone. A rapid strep test or throat culture is the only reliable way to tell them apart, and the treatment differs significantly. Antibiotics clear strep but do nothing for mono.
Signs That Need Urgent Attention
Most swollen tonsils resolve within a week or so, but certain symptoms suggest a more serious problem like a peritonsillar abscess, where a pocket of pus forms next to the tonsil. Watch for severe pain concentrated on one side of the throat, difficulty opening your mouth (a condition called trismus), drooling because swallowing has become too painful, and a voice that sounds thick and muffled, as if you’re speaking around a hot object in your mouth. If the small dangling tissue in the center of your throat (the uvula) appears pushed to one side, that’s another red flag. These symptoms develop gradually and get worse over hours to days. A peritonsillar abscess requires drainage and can’t be managed at home.
When Swollen Tonsils Keep Coming Back
A single episode of tonsillitis is common and usually not a concern beyond the immediate discomfort. Recurring episodes are a different story. The threshold that typically prompts discussion about tonsil removal is seven or more episodes in a single year, five or more per year for two consecutive years, or three or more per year for three consecutive years. Each of those episodes needs to involve a sore throat plus at least one additional sign: fever of 101°F or higher, tender or enlarged neck lymph nodes, visible pus on the tonsils, or a positive strep test.
If you’re noticing a pattern of swelling that keeps returning every few months, keeping a simple log of each episode, including the date, your symptoms, and whether you saw a doctor, gives you useful information to bring to an appointment. That record helps determine whether you’ve crossed the threshold where removal becomes a reasonable option.