Since there are many different kinds of mouth sores, it is important to have any mouth sore evaluated. The causes can range from viral or fungal infections to inflammation and tumors.

If these sores are on the outside of the mouth and lips, they may be herpes or “cold sores.” This condition is easily treated with oral medication or topical preparations and need not affect either of your daily lives. Cracks in the corners of the mouth can be caused by a certain kind of yeast infection, a chronic vitamin deficiency, or dehydration. If the sores are crusty and never heal, they could be skin cancers, and these must be treated before they progress. Sores inside the mouth can sometimes be cancerous or pre-cancerous lesions. These can bleed and may or may not be painful. They can also have a different color and texture from the normal gums, cheeks, and tongue.

Many of these conditions require quick action for accurate diagnosis and treatment. It is important to seek care soon after mouth sores appear; thus, patients with this condition should see their physician promptly.