My daughter had her ears pieced end of Sept 2012. The first week of Dec 2012 she was so excited to try a new pair of earrings! She put in a pair of earrings from Claire's. Instant infection. In fact, we eventually discovered that a homeopathic medicine she was taking for her grass pollen allergy had nettles in it--and apparently she's allergic to nettles. So we quit taking that medicine and are working on getting her body cleared of the nettles and her ears healed up. We put her starter earrings back in. I was so excited--her ear holes look like they're finally healed!--when I discovered last night that one of her ears looks like it's getting pussy again. Darn. Her starters will be in for a while yet (like into February, I think).
We use Himalayan pink salt with water morning and evening to help with the healing process. It appears if we forget to do the salt water, then she has issues with infection.
I am going to order her a couple pairs of post earrings made out of either Niobium or Titanium (about $40-$60 a pair). They are 100% pure with absolutely NO ALLOYS or nickel in them. It's going to take a while before she is going to be able to just "wear anything." I told her she might never be able to just "wear anything," that she might be too allergic. However, Niobium and Titanium are recommended for people who are highly sensitive. There are also a few other pure metals (I've done lots and lots of research on this).
One note: never have your daughter wear cheap earrings, and never any earrings from Claire's. Most of the earrings from Claire's are made in China, which doesn't have a good practice of using good quality/pure metals (I'm talking contaminants here).
Your daughter might have a nickel allergy. Or maybe an allergy to something else, like my daughter did (her body was trying to purge her nettle allergy, and that purging was going through the only open-sore spot on her body it could find, which was her newly pierced ears).
Check the Web site called Wear Earrings Again. The owner has tons and tons of information on there for people with earring/jewelry suspectibility/allergy. I found it very useful as I've helped my daughter through her crisis (I am not allergic and have no issues with what type of earrings I wear). The owner of this site states that in helping over 5,000 people she has not--as of yet--ever found anyone who was allergic to 100% Niobium or 100% Titanium. You might need to go that route for your daughter.
Oh. And we were told that when ears are newly pierced that hoops or dangle earrings should not be worn for at least 6 months to allow the ears to get used to the earrings and for the user to get used to the fact that they have earrings. If you do decide to do dangles, you can buy Niobium and Titanium french hoop wires your daughter could wear. She could technically make her own "earrings" by putting a dangle on the french hoop wire. However, that would have to be monitored so that the non-Niobuim/non-Titanium part of the earring doesn't touch her skin (if she is, indeed, very allergic to metals).
Unfortunately, like I told my daughter, until you get your earrings pierced you have no idea if you're going to have any issues with allergies/suspectibilities. My daughter is upset that she can't wear all the cool earrings the girls in school can wear. Right now, though, she's more concerned with just being able to wear earrings period. So we're working on what she will be able to wear.