In fact, the article said that red and hot are not signs
of osteoarthritis at all, but they could be
symptoms of rheumatoid arthritis, major organs shutting down, allergies, etc.
My doctor looked at my hands one day and said that I had osteoarthritis...they were "normal" that day.
I have had big knuckles since I was a child...and I am " skinny as a rail" , which makes the knuckles look even bigger.