I suffer from chronic pain from a MVA in my back, head, neck, and constant pain down my left leg. I monitor how I eat, everything I do as to avoid flares. I have totally noticed my pain level goes up when the air pressure goes up. Also the real cold weather makes it worse. When pain level goes up so does depression, muddled thinking, less cognitive functioning. I usually stay in bed and try to meditate all day to get through. Stiffness gets terrible and bath hurts too bad to do. You would think water would help but it is like a torture on those days. My mom has arthritis and goes down on the exact same days I do as well as dad with parkinsons disease. We all have bad flare days on the same days. I have noticed the one common factor is the weather. Me and mom can actually feel it coming a day away. hate it.