Red,bumps, itchy rash on legs!?

So my mom has swollen legs and ankles and when you touch it the skin is very tough. You can see the her ankles are enlarged. And it hurts for her to walk. She put creams and aloe Vera but nothing seems to work. Her arms are slightly itch also. The day before she got the rash she waxed her legs. But I didn't get it and I used the same wax, I've gotten red bumps using wax before, but it was gone overnight. I'm really scared for her what should I do and what is it?