Hi. I have penis pain. In the shaft mainly on both sides where the penis connects to the body. It doesn t hurt unless I touch it or unless I wake up with an erection sleeping on my stomatch and its bent. I have a girl friend who had a yeast problem some time back. Everytime I would have sex with her my penis would blister up around the foreskin the next day. I went to the doctor and she ran a bunch of tests that came back negative and said it was probably candidas. So got the yeast cream and rubbed it on and it went away...but everytime I had sex it would come back...so i gave the cream to my girlfriend...and then i stopped blistering up after that but I think after she gave me oral sex once it started. aching the next day. She has alot of health problems and was recently diagnosed with ulcers and a possible lung infection. Her doctor said she might have lung cancer but she doesn t have the insurance to get the tests she needs to find out. She was throwing up blood today. Anyway, after researching what causes ulcers i wondered if she had h.pilori and if my penis was somehow affected through oral sex. This ache won t go away and I am worried it will turn cancerous if left alone. I freaked my girlfriend out and she went to her doctor panicked telling her she had something contageous and her doctor tested her for h pilori and said it came back negative. So i have no idea what it is. I have since moved on. Now i have a different girlfriend and whenever we have sex...the next day she starts itchy and a few times i had to buy her the yeast cream...so i think i may have candida on the inside making me sore down there. Is that a posibility? I don t have any discharge.....i don t break out anymore. What else could it be? All. the terrifying std tests came back negative.