Dear doctor recently i keep having recurring mouth ulcers anf last for a week and will attack agsin. what are the cures and why is this happening?

See below: Mouth ulcers can be due to many causes, most often viral, but recurrent herpes can be diagnosed and treated with antiviral meds for a prolonged period to reduce reoccurrence. Other mouth issues can be related to other benign viruses, diet, stress and much less commonly, malignancies. See you physician for an evaluation.

Trauma & Bacteria: You can also add medications to the list. What is your oral health like? Do you see the dentist regularly? How is your oral hygiene? Do you have broken or sharp teeth? What is your manual dexterity? What is your stress level? Do you grind your teeth? Warm salt water rinses can be a good homeopathic solution for mouth ulcerations. Please see a licensed dentist for a complete exam.

Apthous Ulcer : Seems like you have recurrent apthous ulcers or canker sores, which is a autoimmune response triggered by a variety of factors. There are no cures as of date, however the symptoms can be treated with pain medication and rinsing with warm salt water. Immune supplements may minimize outbreaks.

See a DDS\OS.: Without actually being able to know your medical and dental history, along with be able to clinically see those ulcers in person, we can't know exactly what they are and what are the causes. You need to see a general dentist or oral surgeon who can go over all this information with you, see the ulcers and answer your questions accurately.