Here are some things you may notice:
- Thrush. This is a yeast infection that brings white spots on the tongue and gums, and inside the cheeks. The spots look like milk, but you can't rub them off. Thrush is common in babies. It sometimes occurs in adults taking antibiotics or other medicines. Thrush needs to be treated by a doctor.
- Teething. A teething baby may drool and chew on things. That's because new teeth are growing up through the gums.
- Tooth decay. Signs include tooth soreness, a swollen cheek, and black or brown spots on the tooth.
- Mouth sores. Viruses are often the cause of painful mouth sores, which are also called canker sores. These sores can happen inside your cheeks and on your tongue, lips, and gums. They can be raised bumps or shallow holes.
- Gum disease. You may have red, tender gums that may bleed when you brush your teeth.