Daughters ear piercing question

We took our daughter to have her ears pierced in February, we cleaned them like they told us and for the amount of time they told us. Today I noticed she had some dried blood around one of them, so I cleaned it with the leftover cleaning solution theh gave us. When I got to the other ear, it was the same on the back side, it also has a little hard bump behind it that wasn't there a few weeks ago. My daughter is freaking out. What is that little bump? And why would they have some bleeding so far out from the day she had them pierced?