 [ Symptoms ] i am having frequent left chest pain – echo stress test ecg all normal [ Disease ] are you running or exercising naked there are penile conditions that can cause this reaction but you would need to see a urologist to be properly examined penile retraction can occur because of a ample fat pad in this area or weaker connective tissue exactly why your penis is deciding to hide during exercise is really a mystery until you see a urologist since this is causing your pain when you pull your penis back out from it is temporary hidden position i strongly advise you to get it properly examined