<s>[INST] Hellow doctor,My mom is having mounth ulcer for past one year. Frequently comes on tongue. She is not able to eat or drink , it is very much paining. We consulted a doctors and said it is because of vitamin deficiency. Doctor given some tablets for 30days. Whenever she takes tablets it is fine but if tablets not taken again it comes. May i know how to cure the ulcer completely? [/INST] Thanks for using Chat Doctor. Read your query. Yes, the ulcers can be due to vitamin deficiency or can also be due to stress. These are conditions which is to be treated when they appear. To avoid it recurring you can take few precautions:* Take the multivitamins as prescribed by the doctor.* Advise her to take all nutritious food including egg(boiled)and vegetables and fruits.* Lead a stress-free life.* For the ulcer you can apply denote/mucosal two to three times a day. If it is very painful take a paradox to relieve pain. Hope this was beneficial. Thanks and regards. </s>