Question about potassium permaganate

Oct 2018
2 days ago, I poured a few grams of potassium permaganate crystals (from brumer) into some warm-hot water. A friend said it would my crushed toenail heal faster. I searched up some of the downsides of using potassium permaganate and I regret using it. How do i know there's no more left on my toes? What can i do to get rid of it?