Investigate pre use, What ever is on you skin, It will pull it in to your skin.
nurse was washing a patent that had
(mersa)(spelling) she used it to help with her wrist pain the area between her latex glove and clothing and drew the mersa in and contracted the skin disease, make sure the area you are using on is clean with alcohol, not soap and water, it will draw in the soap chemicals and what ever is in the water.