Sometimes when I am sitting in my office or while I am walking some liquid drops comes out from my penis. What is this please tell me. Last year my body weight is 58 kg now my weight is only 52 kg. I do not understand what happens with me. My age is 24. I also have a nightfall problem. I want to know where I go to get a help. Which kind of doctor help me to gain weight and stops this liquid.?