What Causes Persistent Headaches, Fatigue And Tingling Sensation In The Legs?

Hi my boss has been dealing with issues now for a good month or more - cold and flu like symptoms including headache, tingling and legs feeling weak - also has been breaking out in red spots resembling chicken pox like blisters on face, head and body. I am concerned that there is some underlying cause that is doing this and that she should seek medical help.