goodday doc. i found a yellow crusty stain in my underwear about the size of a couscous. i found six spots or so. i also feel a slight burn when i urinate but its not really bothering or painful. i read the symptoms i have is probably cause by a sexually transmitted disease. im not really sure though. how often does the discharge occur and does the volume of the discharge differ from one patient to another? because mine does not really make the penis head wet. i have to squeeze my penis really hard to see the liquid (which kind of like pre cum with no smell) and it barely makes a drop . sometimes its firm enough to roll it into a ball. btw, my penis doesnt hurt if it gets hard or if i touch it. im really freaking out. do i have std?