A bitten tongue or cut lip usually looks worse than it is: the mouth has a rich blood supply, so even small cuts bleed heavily, and most heal quickly without stitches. A few injuries do need to be closed, though, and a fall hard enough to split a lip can also crack or loosen a tooth. This guide covers how to stop the bleeding, which cuts need stitches at an ER or urgent care, how to check the teeth afterward and what normal healing looks like.
Blood mixes with saliva and spreads, so the amount can look alarming. Work through these steps calmly:
Most mouth wounds close well on their own because the tissue heals fast. These guidelines reflect what usually happens, but if you are unsure, have it looked at the same day. Stitches tend to work well when placed within hours of the injury, so don't wait until tomorrow to decide.
| Injury | What usually happens | Where to go |
|---|---|---|
| Small bite on the side of the tongue or inside the cheek that stops bleeding with pressure | Heals on its own | Home care |
| Tongue cut that gapes open when the tongue moves, or a loose flap of tongue | Often needs stitches | ER or urgent care |
| Cut that goes all the way through the lip, inside to outside | Needs stitches | ER or urgent care, same day |
| Cut that crosses the edge of the lip, where the lip meets the skin | Needs careful closing so the edge lines up | ER or urgent care, same day |
| Puncture at the back of the mouth or palate from a stick, pencil or toy | Needs a medical check even if it looks small | ER |
| Torn gum with a tooth that is loose, moved or broken | Gum and tooth care | A dentist, same day |
| Bleeding that keeps going after 15 minutes of firm pressure | Needs medical care | ER |
Go to the ER, or call 911, for any facial trauma with a possible broken jaw, a head injury, loss of consciousness, or trouble breathing or swallowing. Repairs of the lip skin and deep tongue cuts are typically done at an ER or urgent care; a dentist handles the teeth and gums.
Tongue bites bleed a lot and swell quickly, but they also tend to heal fast. A small cut on the side or tip usually closes within days. Deep cuts that split the tongue's edge are the ones that may need closing.
Lips swell dramatically after a hit, often more than the cut deserves. The swelling peaks in the first day or two. What matters most is whether the cut goes through or crosses the lip's edge, because a scar there is easy to see.
A common cheek or lip bite happens after a dental visit, when a child chews on a numb lip without feeling it. Keep kids from eating until the numbness wears off, and watch that they don't nibble the area.
A gum cut from a fall, a fork or a hard chip usually heals on its own. A gum tear near a tooth, or a tooth that has shifted, needs a dentist.
When a lip is split, attention goes to the blood, and an injured tooth gets missed. Once things calm down, look and feel for:
Any of these deserves a dental visit. Our guides to a cracked or chipped tooth and a knocked-out tooth cover those injuries step by step. We offer same-day appointments Monday to Saturday, 8am to 8pm, when you call or text first; our emergency dentist page explains how they work. Children are seen too, as described on our kids dentist page.
Within a day or two, a mouth wound usually turns white or yellowish. That is the moist version of a scab, not pus, and it fades as new tissue grows underneath. Soreness is usually worst in the first two or three days, and most small cuts heal within one to two weeks.
To help it along:
Call a dentist or doctor if pain and swelling get worse after the third day, you see pus or the area smells bad, or you develop a fever. A sore in the mouth that hasn't healed in two weeks should also be checked, even if it doesn't hurt.
Dr. Aakash Rana, DDS is a general dentist trained at NYU College of Dentistry, with more than $100,000 in continuing education. He plans and treats each case at Prana Dental himself, works with our in-house lab, and refers to a specialist when a case needs one.
Most bitten tongues heal without stitches. A cut that gapes open when the tongue moves, a flap of tissue, or bleeding that continues after 15 minutes of firm pressure usually needs to be seen at an ER or urgent care, where stitches can be placed if needed.
Small cuts inside the lip usually heal within one to two weeks, and the soreness eases after the first few days. The white or yellow layer that forms is normal healing tissue. Increasing pain, pus or fever are signs to have it checked.
A cut that goes through the lip or crosses its edge needs stitches, which many urgent care centers can place. Go to the ER instead for heavy bleeding that won't stop, a possible broken jaw, a head injury or trouble breathing or swallowing.
A white or yellowish layer over a mouth wound is the normal healing layer, the mouth's version of a scab. It usually appears within a day or two and fades as the area heals. Pus, a bad smell or worsening pain point to infection instead.
Yes, if a tooth feels loose, looks chipped or out of place, or your bite feels different. A tooth can be injured even when it looks fine at first, so a check within a few days is sensible, and the same day if a tooth has moved or broken.
Call or text (786) 579-0521 after the bleeding is under control. We're open, Monday to Saturday, 8am to 8pm.