I am not sure if they are connected with AS or something else but occasionally I have periods of a few days when I feel really rough – fatigued and not
that mentally sharp. These often seem to coincide with periods of unsettled weather. In fact most of my bad AS flares have occurred in the spring, often in March and April. The weather is often unsettled at this time and I believe air pressure changes may trigger my AS flare ups.
I think an interesting way of following this up would be to look at the pattern of prescribing anti-inflammatory drugs in different months of the year and relating this to climatic factors.