Hesperian Health Guides

Third Molars ("Wisdom Teeth") Growing In

In this chapter:

When the 4 “wisdom teeth” grow in, this adds a third molar on each side of the mouth, top and bottom. These teeth usually grow in between the ages of 16 and 22 years old. These teeth cut through the gums, sometimes painfully, as they grow into the mouth. Germs can easily go under the gums in those places and cause an infection. When the opposite tooth bites against a sore, infected gum it can make an infection worse.

Signs:
  • Toothache at the back of the jaw.
  • Mouth cannot open properly.
  • A bad taste coming from the back of the mouth.
  • Sore throat.
  • The gum over the new tooth is sore and hurts when you touch it..
  • Person is the right age for third molars to be coming in..
gum flap.
flap
Infection in the gums and pressure from the new tooth are painful. Notice the gum flap over the new tooth.
Treatment:

Do not take out a third molar while there is still infection and pain. Wait for the infection to finish. Then decide if there is room for the tooth to grow in. A dental X-ray can help you make that decision. New molar teeth are often difficult to take out. Ask an experienced dental worker to take out the tooth, if it must be done.

What you can do

First, treat the infection (see below). Then wait for the new tooth to grow more into the mouth. Tell the person what is happening and how to keep the gums healthy while the tooth grows in:


Give amoxicillin (500 mg by mouth, 3 times a day for 5 days) or erythromycin (500 mg by mouth, 4 times a day for 5 days) if there is fever, a swelling, or if the person can only open their mouth a little.


This page was updated:18 Sep 2024