My daughter is 17 and was diagnosed with POTS in August 2011. Her most significant symptom is fatigue. She drinks a lot, eats a salty diet, and takes Florinef and Adderall. Over the summer she seemed to be doing well and even held a part-time job. In mid-October she went to her school's Homecoming Dance and was elbowed hard on the top of the head. She was diagnosed with a concussion (her fifth). She has been experiencing headaches, dizziness and extreme fatigue. The headaches and dizziness are getting better, but the fatigue is not. I took her to a concussion clinic in the major metropolitan area where we live, and the neuropsychologist recommended rest. We're wondering what the overlay of concussion and POTS is, or where concussion ends and POTS takes over. Has anyone here experienced anything similar? If so, what did you do? Thanks in advance for any advice you might have.