Tim Allen. This is the latest accepted revision, reviewed on 7 April 2017. For those of the same or a similar name, see Timothy Allen (disambiguation). Timothy Allen Dick (born June 13, 1953), known professionally as Tim Allen, is an American actor, comedian and author.
Not necessarily. Some of the symptoms of low oxygen can be shortness of breath, fast heart rate, changes in the color of the lips and fingernails, but some people will have a low oxygen level without experiencing any of these symptoms. Others may experience these symptoms without having a low oxygen level.
Why is oxygen therapy used? If your blood oxygen levels are low, oxygen therapy will reduce your feelings of tiredness and breathlessness. However, there are many reasons for feeling breathless and tired, so it is very important to be assessed by a health care professional.