Take more of liquid, less spicy food. Please add your medical history, visit a dentsist to geta proper diagnosis as soon as possible. Because only a single simptom to snap can not always determine the complete and accurate treatment. Take care

Hello.. Ulcers due to stress ate common... I suggest you take more fluids,tender coconut water... You also need to take vitamin b complex for a week... You can use mouth gel containing lignocaine for relief before having food and metrogyl dg gel after food...please consult a physician if no relief within a week as it needs evaluation

Depending upon the location,frequency and size of ulcer it can be of various types.First of all it needs to be diagnosed and treatment will be started accordingly. Till then you can follow the treatment as told by my colleague for symptomatic relief. Visit a dentist as soon as possible for definite cure.As you are having a medical history regarding systemic diseases so the treatment will be done accordingly.