It's the crystallisation of Uric acid that collects & builds up in the joints.
I think opinions are split over what causes it. Most say it's dietary but then those regularly disagree about which foods it is.
I take furisemide daily which can increase the serum levels of uric acid, as well as increasing your chances of pissing your pants. That's why I get it.
It's alcohol that causes it, almost always.

