I hear people indicate flares but what does that actually mean? Sometimes in the last year, I have had incidents where my back was so bad that I was in bed for 3 weeks and could not stand up straight. I have also had a couple of days where things were just really sore and fatigue was awful. I have also been fine in the evening but then I wake up with miserable pain that came from no where and lasted for the day. Are they all considered flares or is there specific criteria for a flare? Thanks in advance.