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There are four types of bleedings:
The minor traumatic bleeding stops spontaneously, the loss of blood is not dangerous in itself. But the wound can still endanger the life of the casualty. See Wound.
The general behaviour is:
A major technique of first aid is to control bleeding through direct pressure with the hand (possibly protected by a plastic bag, a glove or a piece of stuff); it can be replaced when necessary by the application of a bandage over the wound. When the casualty is concious and alert, he can press himself on the wound for a short time (e.g. the time the bystander makes the protection, get a protection for the hands, or get something to make a bandage).
When the direct pressure is not possible (e.g. there is a foreign body inside the wound, or a broken bone comes outside, or the wound is too large for the hand), then it is possible to compress the arteryAn artery or arterial is also a class of highway. Arteries are muscular tubes that carry blood flow away from the heart to the tissues and organs of the body ( by contrast, veins are the return path tubes). The arterial layer that is in direct contect wit against a boneFor other uses of the word "bone", see bone (disambiguation). Gray's illustration of a human femur, a typically recognized bone. Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed,, between the wound and the heart (see Pressure pointmedicine first aid Pressure points are points on the body that produce a known reaction ( reflex) by either hitting, touching, or rubbing them. Most people are familiar with the term from movies where someone uses pressure points to render someone else ei).
In extreme cases of an injuredInjury is damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical. Types of Injury Burns are injuries caused by excess heat or sometimes cold ( frostbite). Fractures are injurie limbA limb (from the Old English lim is a jointed appendage of the human or animal body; a large or main branch of a tree; a representative, branch or member of a group or organization. Most animals use limbs for locomotion, such as walking, running, or climb, a tourniquetfirst aid Note: Wikipedia does not give medical advice. If you or someone else needs medical assistance, seek expert help. A tourniquet is a tightly tied band applied around a body part (an arm or a leg) in an attempt to stop severe traumatic bleeding or may be used. If the medical care are delayed (after a few hours), the injured limb must generally be amputatedAmputation is the removal of a body extremity by trauma or surgery. As a surgical measure, it is used to control pain or a disease process in the affected limb, such as malignancy or gangrene. Types Types of amputation include: leg amputation of digits pa afterwards, just below the level the tourniquet is applied; this is "losing a limb to save a life". This risk is very low in the urban environment of a developped country (the delay before a rescue team arrives is a few minutes after the call), but must be taken into account in wilderness or in countries that do not have organised prehospital medical services. Some first aid instruction no longer teaches the use of the tourniquet because the risk may be greater than the benefit; some other consider that saving a life is above the rest. However, this should always be the last choice.