Most people say cracking knuckles leads to arthritis. It
doesn't! I wouldn't recommend cracking your fingers all the time,
and I personally don't like cracking fingers in the cold. You can,
if you want to, but it hurts. I think the weather of the cold air
affects the finger joints which make them stiff and harder to
crack. Cracking your fingers also open your joint air holes, so
you'll be okay.
Cracking fingers are mostly fine to do!!