Giving yourself too much or too little oxygen can be dangerous. If you are using a pulse oximeter to monitor your oxygen levels and think they are low, see a doctor. You should not use an oxygen concentrator at home unless it has been prescribed by a health care provider.
Read more at: http://www.fda.gov/consumers/consumer-updates/pulse-oximeters-and-oxygen-concentrators-what-know-about-home-oxygen-therapy
