Why are there red dots on the tip of my tongue?

The top of your tongue is covered in two main types of bumps. The tiny, pale, hair-like filiform papillae give the tongue its velvety look and carry no taste buds. Scattered among them are fungiform papillae, which are round, pinker and contain taste buds. Cleveland Clinic notes the fungiform papillae sit mostly on the sides and tip.

Because they have a good blood supply and are concentrated at the tip, they are the first thing to look redder when your tongue is irritated, warm or inflamed. In many people, especially if the filiform coating is thin, a speckling of red dots across the tip is simply how a healthy tongue looks.

Heat and scalds

The tip meets hot coffee, soup and pizza first. A mild scald leaves the papillae red and tender, sometimes with a slightly numb or rough feeling, for a few days.

Sour, spicy and abrasive food

Sour candy, citrus, pineapple, vinegar chips and hot sauce can irritate the papillae within minutes. Eating a lot of them can make the tip feel raw and look covered in red dots.

Lie bumps (transient lingual papillitis)

One papilla becomes inflamed into a sore red or white raised bump, usually near the tip. DermNet reports the classic type lasts 1-2 days and affects more than half the population at some point, most often young women. An eruptive form in children comes with fever and swollen glands and tends to spread through a household; it lasts about a week.

Friction and habits

Pressing or rubbing the tongue tip against the front teeth, biting it, or running it over braces keeps the papillae irritated. Spots that come and go with stress or concentration often have this cause.

• Scarlet fever: the NHS describes a white coating that peels to leave a red, swollen tongue covered in little bumps, with fever, sore throat and a sandpaper-like rash. It needs antibiotics.
• Kawasaki disease: in young children, a red "strawberry" tongue with fever lasting 5 days or more, red eyes, cracked lips and red palms or soles. The NHS advises an urgent GP appointment or NHS 111; in the US, contact your pediatrician the same day.
• Vitamin B12 or folate deficiency: tends to make the whole tongue sore and red, sometimes with ulcers, rather than just the tip.
• Burning mouth syndrome: causes burning, most often on the tongue, but NIDCR notes there are usually no visible changes; if your tongue burns yet looks normal, see burning mouth syndrome.

• Let hot drinks cool and skip sour candy, citrus and spicy food for a few days.
• Cold water, ice chips or plain yogurt can soothe a sore tip.
• A salt-water rinse is a reasonable, low-risk option.
• Brush gently and avoid scraping or scrubbing the tip while it is sore; the tip has little coating anyway.
• If you notice yourself pressing the tip against your teeth, try resting it on the floor of your mouth instead.

DermNet notes that for classic lie bumps, most people find nothing reliably shortens them, so time is the main treatment.

Red dots that settle within a week after you remove an irritant do not need a visit. See a doctor promptly if red dots come with fever, rash, sore throat or feeling unwell, or in any child with a prolonged fever. See a dentist if a single spot on the tip persists beyond 2-3 weeks, grows, or turns into an ulcer that will not heal.