When piercing your lip is it a must to use a clamp?

Well let's get something straight you don't pierce your own lip. You leave that to a professional body piercer to do in a licensed and inspected facility. There is way too much that can go wrong when you try to do piercings yourself, you haven't got the equipment, or the knowledge to do a piercing correctly. Besides that if you screw up (and you will screw up) you leave a mess that a professional body piercer may not want to deal with. Think about it.

improved: actuallyyy ... you may OR may not screw up. my friend pierced her own lip, she did a monroe. it turned out great. she didnt use a clamp and she did it with a giant safety pin AND she used an earring to seal it . so no its not a must.