My sister had several large skins lesions that appeared over night. They look like blisters or a rash consistent with a road rash. She has not fallen. She said she just woke up and they were on her body; mainly on the side and front of her body. I took her to the emergency room. They pulled blood work and all came back ok. I m concerned as to what caused this. There are no new ones and some are healing well. Any ideas on how/what may have caused this? Thank you