What? Lol, they stole this idea from the Predator movie 20 years ago when the monster healed himself with the light!
Hmmm... forget about it. Just take a hot iron or brand, cauterize the wound, presto sealed! Or pull a Rambo, sprinkle a little gunpowder (not too much), ignite, and BAM! wound sealed.
Obviously I'm not a doctor but I'm betting these are not themost sterile methods. You might nor bleed out then but the infection will for sure kill you later.