I have learned a lot about oxygen supplementation since being put on it but too much to write here. Basically if you need oxygen you should use it! But any good pulmonologist would not put you on it if you do not need it. They do a test to determine if you need oxygen before it can be approved and covered by medicare. My pulmo said if your oxygen is 88 or less for 18 hours out of the day then you need it. But that is a generalization and depends on your whole situation. My O2 levels dropped so low (in the 60's!) it was crystal clear I had to have Oxygen but it is not always so clear. So again you need to check with a good pulmonologist and in our case one who specializes in Bronchiectasis. I do not know about occasional use of it as needed or if that is even done but probably an option??