My flare ups seem to start after I've had a UTI or sinus infection where I have to go on antibiotics. Also stress is a big factor. My PsA started in 2008, had flare up in 2013 which took me out of work and 2017 started in April and still have a sausage toe and can't find any shoes to wear. Also spread to both wrist and chest. Makes is very painful to breath, sleep and even move around.

Mine is quite a lot stress related if I get hot because I'm angry my skin burns I itch I scratch it bleeds..

Stress immediately sends me into a flare. Certain foods I eat. Avoid alcohol sugar processed food. I know it is a flare because I itch, I am fatigued, angry, and my joints are stiff painful and swollen.