Infected Uvula post-surgery? (Photo)

Thank you for your question.  From your photo and history, it is almost certain that the breathing tube (endotracheal tube) used during your surgery was pressing on the tip of your uvula and this lead to a pressure sore (ulcer).  The uvula and entire back of the throat are exquisitely sensitive (this is why tonsillectomy is a miserable recovery), so the pain/discomfort is usually out of proportion to the injury.  As long as you aren't having fevers/chills/sweats, its unlikely to be an infection and you should let your surgeon know so he can follow this.  He may also choose to prescribe you some numbing medications.  I hope your recovery is swift.

It is likely that during the intubation process (placing a tube to assist your breathing during surgery) that the endotracheal tube rubbed or irritated the uvula.  Relay your concerns to your surgeon as he or she will likely provide you with a simple solution, such as a topical anesthetic solution.  Best wishes!