Canker sores or oral aphthous ulcers are painful ulcers in the mouth with small ulcers less than 1cm, oval or round with red edges. Treatment of canker sores because the cause of the disease is not yet determined, so it is mainly symptomatic treatment to reduce the number and size of ulcers, reduce pain, reduce wound healing time, and reduce the possibility of recurrence.

Aphthous ulcers are painful, localized, shallow, round or oval mouth ulcers with a gray base. Oral aphthous ulcers are one of the most common causes of mouth ulcers. This disease causes a lot of discomfort for the sufferer and can cause dangerous complications if not treated promptly.