Razorblades, needles, and other small, sharp objects can be hidden easily...even on the head. These tiny, yet potentially deadly, weapons are hidden/taped behind suspects’ ears, under bangs, or on shaved spots on the scalp covered by other long hairs.
On the street, a flashlight may reveal such hiding spots.
During strip searches in a correction facility, have a long-haired subject run his/her fingers through their hair. Be careful if checking the head with your own hands. Blades can easily be set to cut an unexpecting officer.
I think we all know how important gloves are. Please keep this in the back of your mind.