Hello, my toddler daughter has started getting large red welts on her body about a month ago. They last a very long time and look like very large pimples... initially red, and then with white pus. Once the pus comes out they heal very slowly, over many weeks. They are about the size of hives, but they don't go away very fast like hives do. There are a few of them: first she had one and we thought it was a bug bite. Then she had two at once. Now just got another one. Any idea what they may be?