I have an area near #12-14 that keeps on becoming irritated. The Periodontist says he doesn't see anything going on with the teeth after doing X-rays. He's not certain why this area keeps on becoming inflamed. They have given me two products that I can use when there is a problem (chlorhexidine gluconate & a pink rinse (it appears they make this in their office). They both seem to correct the problem after I use them twice a day (only use 1 at a time) for about a week. Sometimes the irritation will come back after a few days. My question is how long can you use these products for? Are they safe to use on an on-going basis?