Oxygen therapy is a treatment that provides you with extra oxygen to breathe in. It is also called supplemental oxygen. You may get it in the hospital, another medical setting, or at home. Some people may need it only for a short period of time. Others may need long-term oxygen therapy. There are different types of devices that can give you oxygen. Some use tanks of liquid or gas oxygen. Others use an oxygen concentrator, which pulls oxygen out of the air. You can find such of these, Chinese make, available in the market. You will get the oxygen through a nose tube (cannula), a mask, or a tent. The extra oxygen is breathed in along with normal air. There are portable versions of the tanks and oxygen concentrators. They can make it easier for you to move around while using your therapy. You may need oxygen therapy if you have a condition that causes low blood oxygen, such as Pneumonia, Asthma attack, pulmonary diseases and offcourse the latest to add to the list is the Covid 19. Oxygen therapy is generally safe, but it can cause side effects. They include a dry or bloody nose, tiredness, and morning headaches. Oxygen poses a fire risk, so you should never smoke or use flammable materials when using oxygen. If you use oxygen tanks, make sure your tank is secured and stays upright. If it falls and cracks or the top breaks off, the tank can fly like a missile.