I've noticed that the skin on the upper part of my penis doesn't open up properly, and the last time I had sex, it started bleeding and was really painful. I'm not sure what to do about it. Could you give me some advice?
It sounds like you may have experienced a condition called **phimosis**, where the foreskin is too tight to retract fully. It's important to avoid any further trauma to the area. I recommend seeing a healthcare provider, preferably a urologist, for a proper examination and treatment options, which may include topical treatments or, in some cases, a minor surgical procedure.