Bleeding occurs in a pulsatile output of bright red blood, if an artery is damaged, or out of dark red blood if a vein is damaged in this case being continuous blood flow.
Hemorrhage caused by a serious injury should be treated immediately in an emergency center. After requesting urgent medical assistance, raise the injured area above your heart (keep the victim lying down, if the wound is in the lower body) covers the damaged area with a cloth (or hands if you do not have cloth) and tightly pressed area for 10 minutes at least, until help arrives unsolicited or while transporting the victim to an emergency center. If the pressure and raising the injured area reduces bleeding not, click on one of the main points of pressure to help control the emission of blood. As a last resort, apply a tourniquet. Incorrect use of a tourniquet can cause irreparable damage to nerves and blood vessels in the affected area.