Yeah +1 on what Jeff White said - I'll just add that, if you do feel the need to use a tourniquet (and this should definitely be a last resort to stop bleeding - I'm an EMT and its very discouraged for even us to use them - if you need a tourniquet, things are pretty damn bad), if will take about 4-6 hours for your leg to become necrotic and be completely beyond recovery.
Don't try to cauterize your wound - you will definitely do more damage than good by sticking a hot knife into a wound. The only time I could ever see anyone doing self-cauterization would be in cases of complete extremity amputation.
Don't try to cauterize your wound - you will definitely do more damage than good by sticking a hot knife into a wound. The only time I could ever see anyone doing self-cauterization would be in cases of complete extremity amputation.