It's not good to be at home and inactive. Try doing some strength/weight training or try fitness exercises at your local health club. Along with an appropriate diet, it will then be easy to develop good health and grow taller. Ok, try to follow these tips to develop better fitness avoid future health or prostate problems.
If you are having prostate problems as in they are enlarged or causing you pain during urinating or a constant urge to urinate. Then I would recommend you take a course of Saw Palmetto, that would help you. Best of all seek medical assurance that there is no other underlying medical issues causing the problem.