You might have a weak immune system due to chronic illnesses or due to anti-cancer ... then you will need to get further medical assistance. Canker sores are yellowing sores that appear in your mouth ...

How to cure mouth ulcers naturally Mouth ulcers can be incredibly frustrating—they make eating, talking, and even smiling painful. These sores pop up due to stress, minor injuries, or certain foods.

Food can’t cause an ulcer. But if you already have one, what you eat and drink could either make it more painful or help you heal faster. The different shapes and colors of your stool can tell ...