She has bites on my legs. They are red then turn white and they feel bumpy.

Bug bites? If you saw the bug bite you, treat accordingly. Show your mom the bites. For mosquito bites apply witch hazel and an anti itch cream. If not use hydrocortisone cream if it is red and itching and consider Zyrtec (cetirizine) over the counter if you have a rash. If it is a spider bite that is causing swelling and dark areas see your doctor for treatment. Wear anti-bug spray before going outside.