I'm not sure if it's arthritis or not.
I have had general achiness and pain in my left hand for about 2 weeks. I attribute it to the onset of arthritis. I am 45 years old, female, overweight (by about 50 lbs). The problems is, I have bruising and discoloration on my knuckles but I haven't hit my hand anywhere. It started with the baby finger and it was a very purplish bruise and only around the middle knuckle to the end of the finger. It went away in 2-3 days. Then the middle bottom (closest to the hand) of my middle finger has turned very purple/blue/yellow in 1 day. I have not injured it. The left hand aches quite a bit. There is puffiness and swelling in the knuckle areas of the rest of the fingers, but it's only the knuckles closest to the hand, not the entire finger.