My Legs Throb Andhurt All Day And Night. They Keep

My legs throb andhurt all day and night. They keep me from moving sometime. When I try getting up from a chair or whatever they throb and hurts too bad. My lower back cross my lower hips hurt all day. My knees hurt so bad I can't stand for them to be touched. My legs throb daily with sometimes a. Burning sensation and my right shoulder hurting from he shoulder to my fingers and BB the fingers have throbbing and cramps