Swollen tonsils are usually visible when you look in the back of your throat with a light and a mirror. Healthy tonsils sit tucked behind the arches of tissue on either side of your throat and are roughly the size of almonds. When they’re swollen, they push forward past those arches and can take up a noticeable portion of the space in the back of your throat, sometimes nearly touching each other in the middle.
Beyond what you can see, swollen tonsils produce a set of physical sensations that are hard to miss. Here’s how to check visually, what symptoms to pay attention to, and when the swelling points to something that needs medical attention.
How to Check Your Tonsils at Home
You need a mirror, a flashlight or phone light, and a well-lit room. Stand in front of the mirror, open your mouth wide, and shine the light toward the back of your throat. Keep your tongue flat and relaxed inside your mouth. Don’t stick it out, because that actually pushes the back of the tongue upward and blocks your view of the tonsils.
Your tonsils sit on either side of the throat, just behind the soft arches of tissue (called the pillars) that frame the opening. Healthy tonsils are pinkish, roughly symmetrical, and mostly hidden behind those pillars. Swollen tonsils are visibly larger, often redder, and may bulge past the pillars into the open space of your throat. Doctors grade tonsil size on a 1 to 4 scale: grade 1 means they’re still tucked behind the pillars, grade 2 means they extend past the pillars and block 25 to 50 percent of the airway, grade 3 means they take up 50 to 75 percent, and grade 4 means they fill more than 75 percent of the visible space. You don’t need to assign a number, but it helps to know that anything past a grade 2 is significantly enlarged.
Look at the surface of each tonsil. Healthy tonsils have a slightly bumpy, textured surface with small pits (called crypts). Swollen, infected tonsils often appear bright red, and you may see a white, yellow, or grayish coating, or distinct white patches scattered across them.
What Swollen Tonsils Feel Like
You don’t always need a mirror to know something is wrong. Swollen tonsils cause a cluster of symptoms that reinforce each other:
- Painful swallowing. This is the most common complaint. Even swallowing saliva can feel sharp or raw.
- A sore or scratchy throat that persists throughout the day, not just in the morning.
- Swollen lymph nodes. Run your fingers along the sides of your neck just below and behind your ears. Tender, marble-sized lumps there are a sign your body is fighting an infection in the throat.
- Neck stiffness or pain, especially when turning your head.
- Fever above 100.4°F (38°C).
- Ear pain. The nerves serving the throat and ears overlap, so a tonsil infection can produce aching in one or both ears even though the ears themselves are fine.
- Bad breath, caused by bacteria and debris collecting on inflamed tissue.
- Stomachache or vomiting, which is more common in children than adults.
If you have several of these at once, your tonsils are almost certainly swollen whether or not you can see them clearly in the mirror.
White Spots: Infection vs. Tonsil Stones
White spots on the tonsils cause a lot of confusion because they can mean two very different things.
With an active infection (tonsillitis), the white or yellowish patches are pus and inflammatory debris spread across the tonsil surface. They’re usually accompanied by significant pain, fever, and redness. The coating can look smeared or patchy, and it doesn’t pop out when you press on it.
Tonsil stones are something else entirely. They’re small, hard or crumbly yellowish-white lumps that form inside the pits of the tonsils over time. They’re made of calcified bacteria, dead cells, and food particles that accumulate in those crypts. Tonsil stones usually don’t cause a fever or severe throat pain. Their main calling card is persistent bad breath and sometimes a foreign-body sensation, like something is stuck in the back of your throat. They can sometimes be dislodged with gentle pressure from a cotton swab. If you see a small, firm white nugget sitting inside a tonsil crypt but your throat doesn’t hurt and you feel fine otherwise, that’s likely a stone, not an infection.
Bacterial vs. Viral Tonsillitis
Most swollen tonsils are caused by a virus, the same kinds of viruses behind the common cold and flu. Viral tonsillitis tends to come with a runny nose, cough, and general cold symptoms alongside the sore throat. It resolves on its own within 7 to 10 days.
Bacterial tonsillitis, most often caused by strep, looks and feels different. Doctors use a simple four-point checklist to estimate the likelihood of a strep infection: fever of 100.4°F or higher, no cough, swollen and tender lymph nodes at the front of the neck, and visible white patches or swelling on the tonsils. Each criterion scores one point. A score of 3 or 4 makes strep much more likely and warrants a rapid strep test or throat culture. The absence of cough is one of the strongest clues, because viral infections almost always produce one and strep typically does not.
This distinction matters because strep requires antibiotics to prevent complications, while viral tonsillitis does not. If your swollen tonsils come with a cough, congestion, and watery eyes, a virus is the likely culprit. If you have a high fever, white patches, swollen neck glands, and no cough, strep is a real possibility.
One-Sided Swelling and Other Red Flags
Swollen tonsils are common and usually not dangerous, but a specific set of warning signs can indicate a complication called a peritonsillar abscess, which is a pocket of pus forming behind or beside the tonsil.
The hallmarks are one-sided swelling that’s noticeably worse than the other side, the small dangling tissue at the back of your throat (the uvula) being pushed away from the swollen side, and increasing difficulty opening your mouth. That inability to open the jaw fully, called trismus, happens because the infection irritates the muscles near the jaw joint, and it occurs in nearly all abscess cases. Your voice may also change, taking on a thick, muffled quality sometimes described as a “hot potato voice,” as though you’re talking around something in the back of your mouth.
If you notice progressive throat or neck pain, difficulty breathing, worsening trismus, a high fever that won’t break, neck stiffness, or any bleeding from the throat, those are signs to get medical attention promptly. A peritonsillar abscess needs to be drained and treated with antibiotics. It won’t resolve on its own.
What to Expect as Swelling Goes Down
Viral tonsillitis typically peaks around day 2 or 3 and gradually improves over a week to 10 days. The swelling is often the last symptom to fully resolve, lingering a few days after the pain subsides. Cold fluids, ice chips, and over-the-counter pain relievers help manage comfort during that window.
Bacterial tonsillitis treated with antibiotics usually starts improving within 48 to 72 hours of starting the medication. The tonsils may still look enlarged for a few more days after you start feeling better. If you’re on antibiotics and your symptoms aren’t improving after three days, or they’re getting worse, that’s a sign the infection may need a different approach.
Some people have chronically enlarged tonsils that never fully return to a small size, especially if they’ve had repeated infections. Persistent enlargement without active infection isn’t necessarily a problem unless it interferes with breathing or sleep.