When I got my earrings, I saw in the fine print that plastic posts can cause irritation if you don't wear earrings very often. OF COURSE I DON'T because every time I do they get irritated, and scab up and get itchy and bleed! So I wore them every day for almost a week. Meanwhile I got sent a pair of metal earrings by mistake, and I wondered if the real problem was not a metal allergy but the fact that I rarely wear earrings .... so I tried them for 2 hours before taking them out. Now my ears are scabbed up and I don't know if it's the plastic earrings or the metal ones. I am trying to wear them again, dipping the posts in alcohol. I'll let you know how it goes.