My 4 month old daughter has a hemangioma on her side under her armpit. It is contantly getting irritated from clothing and people picking her up. It has had a black scab on it for a month or so and is very dry and crusty. Last week, it started to bleed a little, although the blood was not bright red; it seemed to be mixed with something else. It seems like it oozes instead of bleeds. Sometimes it seems like my daughter is in pain when I touch the H. Other times, it doesn't seem to bother her. My question is: how can I tell if the H is infected?