Harry,
I am not aware of any conditon/rash that inhibits the growth of the penis. I do suggest that you have a medical evaluation as soon as possible to clarify this for you. For the record, anabolic steroids(testosterone) have been shown to decrease testicle mass(atrophy). Steroids are very dangerous and should never be taken without the supervision of a physician.
It sounds like you are very depressed as well and should have a psychiatric evaluation/treatment. If you are having suicidal thoughts then you should be seen emergently. This information is intended for educational purposes only. Please see your personal physician for specific health concerns.
Sincerely,
HFHS MD-JM
Keywords: Depression
NRO-Sx, MD/PhD
often results in primary hypogonadism (as NRO-SX has suggested).