Clear anal leakage

For the past month my anus has been leaking a clear, usually scentless fluid. At first I thought this was just sweat, but soon found out it was not. Some days its worse than others. I am always worried that its going to show on my pants and some times it does. Please Help! Is there anything I can do? I eat healthy and workout. It seems to be worse when straining (like when I run or lift weights).