Mouth ulcers could signal vitamin deficiencies. Discover how your mouth might be warning you about your nutritional health.

Canker sores and oral cancer lesions may seem similar but there are ways to tell the difference. A lesion that's red, typically flat, and painful early on is usually a canker sore (aphthous ulcer).

Canker sores are blisters inside the mouth that can occur due to injury ... a dermatologist at Spectrum Dermatology in Phoenix, Arizona, cold sore symptoms include: A burning and tingling ...