Whenever I masturbate, i use Cetaphil skin cream. It's been serving me well for years. Recently however, my supply ran dry, and had to resort to using sun tan lotion. As time has gone by, I've noticed that it now stings to pee, and there has been a burning sensation in my penis. Theres also tenderness in my lower abdomen when i push down on it, and it feels like my bladder is tense, almost like a bladder infection. Is it possible that the sun tan lotion could have caused an infection?