Skin lacerations

Your flesh is flexible, tough and self-repairing. But it has limits. A deep enough cut or tear can benefit from being stitched up, as long as it is properly cleaned and disinfected first, and is no older than 12 hours. So make sure the bleeding is stopped, clean the wound thoroughly, apply a little alcohol, peroxide or iodine, and come on in. If you can't get the bleeding stopped, especially if the blood is spraying out, go to the emergency room right away instead.