Vinegar definitely has miraculous properties and could easily put aspirin/tylenol out of business.
Using a mix of 2/3 +/- plus 1/3 water in a spray bottle to relieve an itchy rash (and also a fever) decided to spray sore ankles/ feet. In minutes, my ankles snapped (normal for me except when swollen), relieving the pressure. Applied to my hands, my knuckles enjoyed the same fast relief.
Spritzing water alone never provided this kind of relief, so I'm holding vinegar accountable.