Positives

• A patient reported that adding a nasal cannula at 2-3 L/min during walking finally kept their saturation above 92% and let them shower or cook without crashing PMC.
  
  
• Someone described improved cognitive clarity and less air hunger after a couple of weeks of supplemental O2 during the day PLOS One.
  
  

Negatives

• A patient said the concentrator was loud, ran hot, and tethered them to one room, which worsened isolation PubMed.
  
  
• Patients reported persistent nasal dryness, nosebleeds, and ear discomfort from the cannula despite humidification PMC.
  
  

Hurdles & Side Effects

• A patient described being denied a prescription because resting SpO2 was normal, even though they desaturated below 88% on the 6-minute walk PMC.
  
  
• Insurance refused to cover home oxygen for Long COVID because it is not on the approved diagnosis list, forcing out-of-pocket rental PMC.