My daughter is eight years old. Has a sudden large rash that covers a large portion of her inner thigh. From groin to a few inches from her knee. Red lines, resembling stretch marks, are raised, rough, and painful to the touch. There is purple bruising on the left side (nearest her knee). Dry skin overall the entire rash. No other symptoms aside from the rash. Reduced activity only due to pain caused from area touching opposite thigh. Her opposite thigh is showing signs of developing the same rash. possible infection.