good afternoon doctor, i am 70 years and have had hyper acidity for the lasr 30 years. i have over this period used every antacid available and some did help for a while but i had to channe it every now and then, presently i am in toronto and drink tap water, is there a possibility that chlorine in the tap water is irritating my sromach, added to this i am now getting a burning sensation in the anus, generally i am healthy as i walk at keast 6 kilometres daily and have diabetes nor bp. can you comment. thank you