Sores inside the mouth, specifically canker sores, can be caused by injury or stress, according to WebMD. Some people are susceptible to sores from eating foods that irritate the tissue of the mouth. These foods can be h... More » Health Dental Dental Hygiene

Studies suggest that several combined factors cause mouth sores, according to Mayo Clinic. Injuries to the mouth, stress, not getting enough nutrients and food sensitivities are all common causes. More »

A sore mouth can be caused by a systemic illness, a local infection, an allergic reaction, an irritant or improperly fitted dentures, according to Merck Manuals. It can also result from chewing tobacco, wearing braces an... More » Health Conditions & Diseases Cancer

Red spots in the mouth can be caused by canker sores, allergic reactions, vitamin deficiencies, oral trauma, stress or a systemic disease, according to Patients who observe red spots or sores in their mo... More »

The cause of tiny white mouth sores, also known as mouth ulcers or canker sores, is unknown, but tissue injury and stress are likely causes, and acidic and citrus fruits and vegetables exacerbate the condition, according... More » Health Pain & Symptoms

Two common reasons for a swollen roof of the mouth include canker sores and burnt tissue along the roof of the mouth, according to MedlinePlus. The remedies for canker sores and burnt tissue include treating the affected... More »

Hydrogen peroxide rinse is a mild antiseptic and a safe, effective treatment for minor mouth irritations such as canker sores, cold sores or gingivitis, according to WebMD. Hydrogen peroxide kills germs and helps remove ... More »