Reducing or stopping arterial blood flow to any tissue for an organ (for example, arterial blockage by a clot or by injury like a gunshot).Anemia and/or conditions that destroy red blood cells.Heart problems (for example, severe bradycardia, and ventricular fibrillation).Any medications that reduce or stop the effort for breathing (for example, fentanyl and other narcotics).Chronic obstructive pulmonary disease ( COPD).The low or absent concentration of oxygen (for example, high altitudes reached without supplemental oxygen as seen in mountain climbing, and aviation, drowning, or fires).Chemical or gas poisoning (for example cyanide, carbon monoxide).Some of the many causes of hypoxia are the following: The causes of both environmental and tissue hypoxia often result in the intermediate state of hypoxemia thus the causes of any type of hypoxia are also potential causes of hypoxemia. People with asthma can prevent hypoxia/hypoxemia symptoms by taking certain medications regularly as prescribed by their doctor. Hypoxia and/or hypoxemia may be prevented in some individuals by avoiding circumstances that reduce the oxygen concentration in the environment or by providing oxygen before symptoms develop.Techniques vary widely according to the patient's condition but may include oxygen by face mask or nasal cannula, mechanical ventilation ( intubation), hyperbaric chamber, or other devices or medicines to open airways. Treatment for hypoxia and/or hypoxemia is to give additional oxygen to the patient and into the environment or the body (blood) as quickly as possible.In general, hypoxia and/or hypoxemia is diagnosed by physical examination and by using oxygen monitors (pulse oximeters), determining, the oxygen level in a blood gas sample and may include pulmonary function tests.Hypoxia or hypoxemia symptoms in children may be mouth breathing and drooling.Other associated symptoms also may be present.Symptoms of hypoxia and/or hypoxemia may be acute or chronic and vary in intensity from mild to severe.There are a variety of causes and potential causes of any type of hypoxia.In general patient's hypoxemia, the blood oxygen level is about 92% or lower.Hypoxia is a condition or state in which the supply of oxygen is insufficient for normal life functions hypoxemia is a condition or state where there is a low arterial oxygen supply - in some publications these terms are used interchangeably.Hypoxia is a state of insufficient oxygen supply for normal life functions, and hypoxemia is a state of low arterial oxygen supply.