<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing recurrent mouth ulcers that are really painful. I looked it up on the internet and I think I may have aphthous ulcers. What do you think?  <response>: Based on your symptoms, it does sound like you may have aphthous ulcers. However, to confirm the diagnosis, we would need to perform a biopsy. We would also need to conduct an interview and evaluation to determine the cause and potential treatment options. 