Oxygen is vital for metabolic processes in cells and therefore the function of tissues within the body. The atmospheric content of oxygen within a room is only 21%. Although this amount is adequate for healthy individuals, those with certain diseases can benefit from an increased oxygen fraction in the gas they breathe, which will increase the oxygen content of their blood. Some acute and long-term (chronic) illnesses can reduce the amount of oxygen that is transferred from the alveoli in the lungs to the blood. Examples of these conditions include chronic obstructive pulmonary disease (COPD) and pneumonia. In people with these conditions, oxygen therapy can help them function better and become more active. A doctor performs tests such as the pulse oximetry test or arterial blood gas test to decide whether or not a person has a low oxygen level and requires oxygen therapy. People who receive oxygen therapy often see improved energy levels, improved sleep, and an overall better quality of life. Many people who need supplemental oxygen live normal, active lives. In some cases, oxygen therapy can increase life expectancy. The dermatologist or the cosmetologist can perform the Oxygen facial therapy and the duration for the therapy can be determined based on the individual needs. Oxygen therapy, when used as prescribed, can give energy required to function better and be more physically active.