Tissue hyperventilation is a medical term for the normal condition in which arterial blood has a higher oxygen content and venous blood has a lower oxygen content. The tissues of the body supply oxygen to the tissues and organs through the arterial blood supply, and then the tissues and organs absorb oxygen and return it through the venous blood, which has a lower oxygen content, which is commonly known as tissue hyperventilation. The skin, subcutaneous tissues or internal organs of the body such as heart, liver, lungs, kidneys, spleen and even bones all include two blood systems, one arterial system for blood supply and the other venous system for blood return.