Good evening girls I am 7 months pregnant, my leg and knees hurt badly…

Good evening girls I am 7 months pregnant, my leg and knees hurt badly (the sciatic nerve is pinched on the right side) I wanted to ask, they put magnetic banks and they say don't tell anyone about it. But I don't feel any improvement? I read that you can also put and not put. Now I think how to be. Can you please tell me what has happened? How did you do it? What did you do?