If you don't mind sharing his name will put him and your family in my prayers. Does he also have low white and red blood counts? Did they do a spinal tap to test bone marrow?

I've had a low platelet count for over a decade. I switched to an alkaline diet and that doubled my platelets from 60 to 120, where they have been steady for this decade. You'll find charts online showing which foods are alkaline and which are acidic. I simply swapped out foods: like now using almond butter instead of peanut butter. The hardest swap for me was switching to green tea from black tea, but I've found ones that I like. Milk is actually slightly acidic. Lastly, I recently learned that low copper levels can cause low platelets. I just had mine tested and my level is below normal, so my doctor has just added copper supplements and we shall if that helps. MDs don't believe that diet has anything to do with this, but I'm not giving up this diet since it is the only thing that improved my platelet count -- and it is an anti-inflammatory diet, so that's good for anyone.