It all started with a cracked tooth. The tooth was drilled and I had a crown placed. All of a sudden I felt pain in infection started in the tooth. My doctor thought it seemed like a sinus issue since they are so close to my teeth but nobody could figure out what was the true cause of the infection so they did a root canal.   The root canal was successful and everything looked really good but eight months later I'm continuing to get severe pain in that area. The pain goes into the left sinus where the cheek is in my glands are constantly swollen. I even get really bad pain on the left side of the back of my head. I take Claritin-D and that seems to help some Times.  I've gone to over 10 doctors and specialist even ENTs but no one can tell me what's wrong. They all say they can see the swelling they've even taken CAT scans with iodine but they don't know what's causing all the inflammation around my face and glands.  I have spent so much money and tried so many things to figure out what is wrong but no one can help me and I'm starting to feel like I'm crazy...