I used to walk a lot, I've never had a problem w walking but from over a few months, my legs, lower back and hips hurt a lot while walking, my muscles get very stiff, and I feel like I can barely stand cause of pain, on sitting, I can feel pulses in my legs like blood is rushing to my legs and my hands and feet very red and become warm, what could be the reason for it? I have Celiac disease, fibromyalgia, dysautonomia, postural orthostatic tachycardia syndrome and restless leg syndrome. Now I know this could be a fibro thing but walking has always been good for me in fibro and I was able to walk hours and now medications have been working well for me for fibromyalgia.