: In general, this problem is more due to the lack of iron or vitamin B12. It is very important to eat healthy food to get rid of the problem. Such as fruits , vegetables , milk , fish and meat without fat. These foods contain a lot of zinc , vitamins and iron to get rid of mouth sores. Make it a habit to use mouthwash regularly. Riboflavin tablets are sucked and the wound is relieved. If the pain is severe, paracetamol can be taken. A type of face cream or gel can also be used. This mouth is a very sensitive part of the tongue , do not use the medicine on its own.