Hi, my 31 year old had a root canal in January 2010. Although he had always suffered from allergies and sinus problems, his condition became increasingly worse, and over 6 months he had severa severe sinus infections, migranes which would be so intense he passed out. The doctor related this to his root canal months before. They took x rays but found nothing, although he had been told that the roots of the tooth had punctured the sinus cavity. Here we are, more than 18 months later, and he has had kidney,intestinal, throat, ear and more sinus infections. He is weak and goes to work, but has missed a lot. Two weeks ago after using the nettie Pot he sneezed hard and a big glob of mucus came out his nostril (he said it looked like chicken fat...with blood vessels around it). He pinched it and noticed something hard...investigated further and saw a piece of broken tooth in it. He has been diagnosed with mononucleosis, has been given more strong antibiotics for infections and does not seem to be improving. Yesterday (10/11/11) they did a CAT scan, thinking he had an infection in he mastoid bone...but fortunately it was not so serious...and is an infection in the eustachian tube. More strong antibiotics. His wife and I do not know what else to do..what can be causing so many infections? They have studied his blood, (nothing wrong), they have taken CAT scans (nothing shows up). I live in another country, but am about ready to hop on a plane and go back to the US until he finds answers and is better. ANY IDEAS???