<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have this open wound in my mouth and Ive been experiencing neck swelling and sneezing lately. What could be causing this?  <response>: Based on your symptoms, you may have developed an infection in your mouth called Ludwigs angina. It can cause neck swelling and spread to the airways, leading to sneezing and difficulty breathing. 