Friend has numerous open sores that are not healing, getting worse, spreading. They itch. She went to the ER 4 days ago. They said they were just flea bites. She has owned the dog 3 years and has never had a problem with flea bites in the past. The open sores are on her lower legs, now she has a few smaller bumps starting in her feet. She was recently diagnosed from pre diabetic to diabetic. Her legs are normally heavy but now the are also swollen. She recently moved into a new apt. ; they have a bad roach problem..