You can get scabies anywhere you have skin or flesh, in some cases people have reported them within their mouth or on their eyeballs, these would be in more severe cases such as norwegian scabies. In your case you could use sulfur shampoos and soaps daily and this should kill them off as scabies have a hard time living on the face and scalp as they prefer places with alot more skin folds and warmth. You can get some sulfur cream and soap online below:

Buy Scabies Sulfur Soap and Creams



Good Luck