High platelets, no clue until routine blood test. Saw Haematologist, on Hydroxyurea since May/18 and took about 3 months to lower platelets. 78 yrs old, active and reasonably healthy .. Some allergies, well controlled asthma and have had two past surgeries for sinus polyp problem. Polyps are treatable but not curable. Since an infection could affect platelets, I saw a specialist re sinuses. He said I may need another surgery to help with existing polyps but did not seem to think it was cause of high platelets. (However, in doing a bit of reading I have seen some studies that say people with sinus polyps show higher platelets?). Very hard to say what is correct. Also, asked whether diet could lower platelets somewhat. Haematologist said definite no. However, again in doing some reading, there is info that says certain foods can lower platelets. I am not happy to be taking Hydroxyurea, as while it can be used for high platelets, it sounds like it affects pretty well all cells in your body. Certainly have noticed side affects and all seem to match up with the info the drug store provided with the Hydroxyurea. So far the Haematologist has pooh poohed all side affects. I have another appointment coming up soon, so another blood test re platelets. Still thinking and not sure what I am going to do about this but not happy taking Hydroxyurea forever. No one wants to have a possible stroke, thrombosis etc as a result of high platelets .. But at the same time, Hydroxyurea can lead to other problems. Sort of like taking your car to the garage to get get new tires so that you will drive safely but then the wheels fall off! I am speaking only for myself here and not saying you or anyone else should follow my thinking. Part of me is influenced by my age and that makes me wonder if my remaining quality of life is going to be affected too much by the medication. I have a neighbour that told me she has been taking Hydroxyurea for years but I don't know the exact facts involved for her. I have been pretty lucky health wise and have not needed much medical care over the years, as compared to others in my age group. Did have one problem where I exactly listened to a Doctor against my judgment and that turned out to be a disaster. So forever after, I will be questioning and trying to pick up all the information I can on medical issues. Guess I am a doctors nightmare. Don't know if anything here helps but I am just sharing my experience so far.