This is Dr. David
steroid creams on the genitals over time can cause thinning of the skin.
you can find antifungal creams which do not have hydrocortisone in them which would be better for the penis and scrotum.
Canesten is a clotrimazole 1% cream which is an antifungal cream.
and is sold without hydrocortisone as well
you should use that on your penis and scrotum.
I hope the fungal infection gets better
let me know if you have questions.