Hi, a friend of mine got bitten by a spider 6 weeks ago on the back of her leg and it swelled up to the size of a softball. Her Doctor put her on antibiotics and it got worse before it got better. Now, she has a rash that started near the bite, traveled up her leg to her groin and it is on her arms. She said it shows up and goes away on and off all day. It looks different on every section of her body. Some is pussy, some is red and flat. Some look like bumps with wicks in them. Any ideas?