A reader told us last time that she suffers severe pressure headaches from blocked sinuses. She suspects the cause is a root canal filling in an upper back tooth. Is she right? One reader reports feeling like 'a million bucks' after having a molar extracted, which had had several painful replacement fillings, so the answer has to be a 'yes'. On the other hand, how about 'no'? Another reader doesn't think there can be any link between sinusitis and the filling. Her sinusitis cleared only after she had hers cleared. One self-help remedy is Forever Living's Aloe Activator, a spray bottle for nasal use. On the dietary front, another reader suggests removing dairy from the diet for at least six weeks. She warns that the problem will get worse before it gets better, but that is a typical pattern when de-toxing. One reader's sinusitis was cleared after one visit to an acupuncturist, who placed a needle into the lower cheek.