<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing vomiting and difficulty in swallowing. Do you have any idea what could be causing this?  <response>: Yes, these symptoms could be a sign of Erythema multiforme. It is a type of hypersensitivity reaction that causes skin lesions and can also affect the mucous membranes, which can lead to vomiting and difficulty in swallowing. 