My 3 yr old has a small raised bump on her hip surrounded by a bruise. I noticed it a few days ago but then it was a small black spot about nickel sized and thought nothing of it. Today she woke up and it was a giant bruise. That was when I noticed the bump in the middle of it. Is this some type of bite?
Hi...by what you quote it seems like an insect bite allergy. You can try out some oral antihistamines and if it is not subsiding kindly consult your pediatrician. Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically.  Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome.  Wish your kid good health.