As a medical professional, I can provide you with information on the early and late signs of hypoxia, which is a condition where the body or a region of the body is deprived of adequate oxygen supply. Early Signs of Hypoxia: 1. Restlessness or irritability can be an early indicator as the body tries to increase alertness. 2. Increased heart rate (Tachycardia) as the body attempts to pump more blood to deliver oxygen. 3. Rapid, shallow breathing (Tachypnea) because the body is trying to take in more oxygen. 4. Confusion or disorientation as the brain is particularly sensitive to oxygen deprivation. 5. Headaches due to the stress on the brain from lack of oxygen. 6. Pallor or paleness can occur as the skin may appear white due to poor circulation. 7. Pulmonary hypertension as the lungs struggle to oxygenate the blood. Late Signs of Hypoxia: 1. Cyanosis, a bluish discoloration of the skin and mucous membranes due to low oxygen levels in the blood. 2. Slow heart rate (Bradycardia), which can occur as the body's response to low oxygen levels changes. 3. Reduced level of consciousness, ranging from drowsiness to coma. 4. Papilledema, swelling of the optic disc due to increased pressure in the brain. 5. Breathlessness or the feeling of not getting enough air despite adequate breathing effort. 6. Seizures can occur due to severe cerebral hypoxia. 7. Cardiac arrest in extreme cases as the heart fails from lack of oxygen. It's important to note that the signs can vary depending on the severity and duration of the hypoxia, as well as the individual's overall health and response to stress. Immediate medical attention is crucial if hypoxia is suspected. read more >>

In severe hypoxia, or hypoxia of very rapid onset, ataxia, confusion / disorientation / hallucinations / behavioral change, severe headaches / reduced level of consciousness, papilloedema, breathlessness, pallor, tachycardia, and pulmonary hypertension eventually leading to the late signs cyanosis, slow heart rate / ...read more >>