To Prevent Infection: Clean both of your ears and all earrings with alcohol Before and After wearing them. Do not put Hydrogen Peroxide (or any Bleach) on any Silver jewelry...If you have sensitive skin. After you try on an earrings, please check it in 30 min to see if you have any redness on that ear. We recommended taking the earrings off before shower and don't wear it when you go to bed.