Quite common in women, urinary tract infections can plague men as well. These infections start afterward bacteria create their pretension going on the urethra and settle there, leading to penis pain, irritation, and avanafil 100mg redness. These infections might not harm that much at first; a man might without help proclamation the headache similar to he urinates. But beyond time, they will acquire worse. A urinalysis will incite determine the cause, and most urinary tract infections are definitely treatable following a course of antibiotics.For men under 35, the most common reasons for penis stomach-ache adjoin sexually transmitted diseases later than gonorrhea or chlamydia.