The condition you are suffering from is called recurrent aphthous stomatitis. It is a disease due to immunological factors. This will be true if your ulcers occur at different sites in your mouth and self heal in a period of time. You need to visit a dentist with interest in treating medical disorders of the mouth so that you can get a better understanding of what your disease is and what causes it. If you don't understand what it is, you are in no place to get it treated. The suggestions given here by other doctors are all very helpful. But you need to understand why it occurs.

Sir, if its happening frequently you should rule out if its because of any sharp tooth if not then could be because of gastric problems and for that you should consult physician.

Mouth ulcers can be because of many reasons and factors.  We can broadly divide them in to two 1) local factors : like sharp tooth, any hurting appliance in the mouth, some injury inflicting habits, some fillings may produce allergies manifested in the form of ulcers 2) systemic factors : stress,  gastric upset/gastric diseases and ulcers, some diseases like syphilis, alcohol, spicy food,  allergies to some systemic drugs etc there are many more

Don't weast time Visit an Dentist for Clinical examination for diagnosis. Thanks

Hello, you can do baking soda in water mouth rinses, this will help to heal ulcers. if it still persists, consult to a physician and get your vitamin B levels checked. if required start taking suppliments.

You might be suffering from Apthous Ulcer, which might be due to allergy to some medicine or edible , u must co-relate it with the food u had prior to having the ulcers. It's usually associated with stress, may b during exam or results.

Hi,The reason for ulceration is maybe stress,vitamin deficiency .Visit a Physician for consultation .

Hello. There are many reasons for different type of ulcers in the mouth. Stress,vitamin deficiencies,sharp edges of teeth/oral appliances and improper eating habits are some of them.Take plenty of water and eat fresh fruits and veggies and take a course of multi vitamin tablets. Regards Dr Sumanmakam

Hello there...I can understand your concern. Recuurent ulcers in the mouth can be due to many reasons like vitamin deficiency, candidiasis, herpes simplex infection, pemphigus, oral lichen planus. It is to determine the cause because treatment of each condition differs. So kindly consult a physician for further evaluation.