Leg pain help

I know this probably sounds weird but for the past 6 months or so whenever I take a hot shower or bath or sit in a hot tub, it makes my joints in my legs (knees and ankles) hurt really bad. Like after about 10 minutes it's painful for me just to stand or take any steps in my shower. This pain ONLY happens in warm/hot water and no other times. It's been progressively getting worse and I'm not sure what to do about it because it happens even if I dont make my showers as hot (and I don't want to be stuck taking cold showers for the rest of my life).

I've been reading online it could be arthritis but at 22 would I be too young to have that? Anyone have any ideas about this or what to do about it?