 [ Symptoms ] 20 year immunity cycles i keep getting sinusitis every 6 8 months for the last 2 years prior to that i was getting this every 2 4 years i asked my physician why is it that i am getting sinusitis at a much greater frequency he told me that immunity can hold for 20 years cycles in which time immunity can be lost and one has to reacquire immunity this is the first time i heard of this and can not find anything to support my doctors claims is it possible he was misinformed is immunity not lifelong [ Disease ] hi you are almost having a gastrointestinal disorder commonly known as ibs or irritable bowel syndrome it is usually of unknown cause and sometimes stress causes it there are a lot of things you can do to relive that eat healthy foodfruits vegetables do not take caffeinated beverages or chocolates or fried foods do some type of exercises and yoga to reduce your stress you can take one of the over the counter tablets for ibs i e coloverin d regards please feel free to reply if you have any further questions