My daughter was having terrible problems with her ears.  Sores and pus and bleeding constantly.  We were going to ask for hypoallergenic earrings on the day we went to get her ears pierced but they were $70 vs. $15 so we went with the cheaper ones, obviously.  We should have brought our own I guess.  Horrible experience.  We tried sterling silver earrings and they seemed better than the original earrings at first but I think the backs were what was bothering here with those ones.  We changed to these a little over a month ago and they've been great.  Haven't fallen out once.  They are very small so perfect for a seven year old.  They are cute so she feels fancy.  I like that the surgical stainless steel doesn't seem to bother her and not having a back to the earring to rub against her skin seems to help.  So glad we found these.