<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have a swollen lip and jaw, and Im experiencing pain in my gums, fever, and mouth ulcers. Do you have any idea what could be causing all of these symptoms?  <response>: Based on the symptoms youve described, its possible that you have gum disease. Gum disease can cause swelling, pain, and fever. The mouth ulcers may also be a result of the infection in your gums. 