Positives

• One patient noted that their wife, who has been suffering from long COVID since August 2020, experienced “immediate relief” from nerve pain and muscle cramps after using magnesium oil spray, despite already taking oral magnesium supplements Reddit.
  
  
• In another report, a patient decided to try magnesium spray for topical absorption and found it worked “instantly” for their symptoms Reddit.
  
  

Negatives

• Patients who tried daily magnesium oil spraying for months often report no measurable change in serum magnesium and switch to oral glycinate, echoing reviewers who note the stratum corneum blocks ionized magnesium chloride from absorbing through skin PMC.

Hurdles & Side Effects

• Patients complain that magnesium oil leaves a sticky salt residue and produces intense itching/stinging on first applications, with several switching to magnesium sulfate dissolved in water or to Epsom-salt baths because those don’t irritate the skin the way the chloride spray does Phoenix Rising.
• Patients commonly discover by trial and error that they need to dilute the spray 1:1 with water, apply 20 minutes before showering to wash off residue, and avoid freshly shaved skin to keep the tingling/itching reaction tolerable — recommendations the manufacturer itself now publishes in its FAQ.