Hello Currently I am suffering from mouth ulcers. Mouth ulcers are quite frequent for me, as they occur like once in every two months. I do take gel to get some relief but its very difficult to eat food. This is the first time I am having ulcers on back side of tongue making it tough to chew or swallow he food. What is the main cause of mouth ulcers. What type of food should I take to avoid mouth ulcers to occur next time. Please suggest