Hey! I have been piercing ears for 10 years(my daughter included). The best advice I give is to use piercing earrings for every day. I know that it is fun to put those cute little baby earrings in just as soon as the first six weeks is up, but for several reasons, the piercing earrings are just better. One, the back is lokcable....no falling off. Two, there is virtually no risk of allergy. Three, the gage is larger, so the hole stays wider. The baby earrings that you buy have a very fine gage, and the hole will close to fit that size. This causes problems when she tries to put a larger gage post in later years. The hole has to stretch, and will get sore and irritated, causing a scab,etc... You can purchase really cute piercing earrings at some of the independent beauty supplies. Sally Beauty has them, but they are usually more expensive. Try to find an independent ethnic beauty supply. You don't have to have a license, and the selection is usually really cute. Just tell them you want the ones that are put in the guns. Dip the ends in polysporin before pushing them through, and apply the polysporin to the backs before locking them on. They won't hurt her at all, and will allow the hole to heal. Just clean them and reapply poly periodically. My daughter is 11 and has worn these earrings since she was 18 months old. And finally, in answer to your question(haha!), it will close up quite fast, so you really should put the post back in if you want to preserve the piercing. Put polysporin on with it and it will heal just fine, with no pain. Good Luck!!