I Have Just Gotten My Prescription Of Eurax Cream To

I have just gotten my prescription of Eurax cream to treat possibly scabies. Doctors aren't sure and I haven't seen a dermatologist. It's persisted for 6 weeks. Can I use the Eurax on my scalp and face, as there are bumps and some irritation on my scalp? I've already applied it everywhere else. Also, I guess I must keep reapplying Eurax to my hands because I have to wash them. Thank you.