Positives

• One individual exploring treatments for CFS found that using a transcutaneous vagus nerve stimulator (tVNS) or a TENS unit was beneficial, seeking advice on the optimal time of day and duration for its use Reddit.
  
  
• A Long COVID patient using a Nurosym device every other day for only 12 minutes reported it consistently delivered deeper sleep (with vivid dreams) and pain relief Health Rising.
  
  
• A nearly bedridden patient with severe ME/CFS using an iStim TENS plus ear clip described feeling like the body was being forced to relax, sometimes falling asleep, with benefits varying greatly by electrode placement Health Rising.
  
  

Negatives

• A patient with ME/CFS tried an ear-clip tVNS device for 4-5 weeks and reported no benefits at all Health Rising.
  
  
• A patient used a Nurosym device for 70 days at 30-60 minutes a day and said it didn’t help despite extended use Health Rising.
  
  
• One patient reported the only thing an ear-clip tVNS did was “make me feel very nauseous for hours after using it,” preventing her from titrating upward Health Rising.
  
  

Hurdles & Side Effects

• A patient considering VNS mentioned the financial barrier, planning to use their tax return to afford this “expensive treatment” Reddit.
  
  
• A patient with severe ME/CFS cautioned that “any type of normal tVNS settings can crash you really fast and really hard,” recommending starting at the lowest possible intensity Health Rising.
  
  
• The same Long COVID patient who benefited from 12-minute Nurosym sessions reported worsening symptoms when she tried the longer 35-minute clinical protocol, suggesting overstimulation can backfire Health Rising.