I Can,t Express My Problem In My Pennis .on My

I can,t express my problem in my pennis .on my pennis so much scratching there and my body part also .I consulted doctor he said permethrin cream you use it will prevent our .I said my problem on my skin only.i don't tell problem on my pennis .body and pennis problem it seems likely .now can I use permethrin cream on my pennis