Can I put this under my feet bottom of my feet during the two week wait? Can it affect conception or implantation?

I do feel heat in abdomen after putting them under my feet as it automatically warms my whole body so maybe it does higher core temperature as if a hot bath. As the pack says it can go up to 54 degrees celcius.

I have put it and ovulation already occured but my feet feel so warm now after putting it the heat feeling is not going.