Why are there lumps on the back of my tongue?

The back third of your tongue looks very different from the front. Instead of the fine velvety texture you see near the tip, it has a few large round bumps and a cobbled, uneven surface. That is how everyone's tongue is built.

Cleveland Clinic describes the circumvallate papillae as the bumps on the back of the tongue that appear larger than the other papillae. A review in Oral Oncology notes that the lingual tonsil sits at the base of the tongue next to the circumvallate papillae, while smaller patches of the same lymphoid tissue lie at the back sides near the foliate papillae. Because these structures come in matched pairs or rows, the left and right sides normally look about the same.

Searches for "large bumps on the back of the tongue near the throat" often start the same way: someone sticks their tongue far out in a mirror for the first time, or starts using a tongue scraper and feels the edge catch on something firm. The bumps were almost always there before.

Things that can make normal bumps look or feel more obvious for a while:

• Irritation of the papillae. Cleveland Clinic lists the back of the tongue as one of the places where transient lingual papillitis (often called lie bumps) can cause small sore red or white bumps that settle in a few days.
• A burn from a hot drink. Burns can make papillae and taste buds swell for a few days.
• Pressing or rubbing them. Repeatedly checking a bump with your finger, toothbrush or scraper can make it tender and redder.
• A sore throat or cold. The whole back of the mouth can look redder and feel more sensitive while you are ill, which draws attention to the area.

Most people who look up lumps at the back of the tongue are seeing normal anatomy. A smaller number have something that needs a professional to look at it:

• Lingual thyroid. Thyroid tissue that did not move down into the neck during development. The American Academy of Family Physicians (AAFP) describes it as a smooth, nodular mass in the midline at the very back of the tongue. It can cause a lump-in-the-throat feeling or trouble swallowing, and many people with it have an underactive thyroid.
• Squamous papilloma. A benign growth linked to low-risk HPV types that looks like a small cauliflower or a bump with finger-like projections. It is usually removed and sent to a lab.
• One-sided enlargement of the lingual tonsil. The Oral Oncology review stresses that tonsil tissue that is enlarged on one side only needs checking, because it can occasionally be a lymphoma or a squamous cell carcinoma, even though many turn out to be harmless reactive swelling.
• Base-of-tongue (oropharyngeal) cancer. Cancer at the back of the tongue is classed as a throat cancer. Cleveland Clinic notes that HPV infection is the most common cause, with tobacco and alcohol as other causes. It is rare, but it can start without obvious pain, which is why a persistent one-sided change matters more than how much it hurts.

The American Cancer Society says that if signs like a lasting sore throat, trouble swallowing, a lump in the neck or back of the throat, or ear pain go on for more than a few weeks, you should see a doctor or dentist so the cause can be found.

• Stop prodding. Give the area a week without pressing, pinching or scraping it. Constant checking keeps normal tissue irritated.
• Scrape the front and middle, not the throat. A tongue scraper is meant for the coated surface in the middle of the tongue. You do not need to reach the circumvallate papillae, and pressing hard on them can make them sore. If reaching back makes you gag, see our gag reflex guide.
• Soothe irritation. A warm salt water rinse (half a teaspoon of salt in a glass of warm water, swished and spat out) and cool, soft foods help if the area is tender.
• Skip very hot drinks and spicy food for a few days if the bumps feel sore.
• Set a check date. If a lump is new or one-sided and still there in 2 weeks, book an appointment instead of watching it for months.

A dentist is a good first stop because they examine the whole mouth at every check-up and know what normal papillae look like. The very base of the tongue is hard to see by just looking in, so a doctor or ear, nose and throat (ENT) specialist may use a small mirror or a thin camera called an endoscope. They will usually feel your neck for swollen lymph nodes too.

If anything looks unusual, the next step is often a biopsy, a small tissue sample checked under a microscope. That is the only reliable way to confirm what a lump is, and being sent for one does not mean a doctor thinks it is cancer. Regular dental visits, not smoking, limiting alcohol and getting the HPV vaccine all lower the risk of the rare serious causes.