three days ago. Felt ok when I got on the plane, 5 hours later when I disembarked, felt lousy. Since then I have had all original symptoms return - I have Hashimotos, so aching muscles and joints - and a new one, burning legs! They feel like they are on fire. I am wondering if this is just coincidence, or something to do with the flight? Must admit my legs did feel a little 'tight' at times. Am taking ibuprofen atm.