Hi, I'm also plagued with hand and feet cramps mostly in the morning, just as I am awakening, but moreso, the cramps occur in my toes, arches, through the ankle and up my lower legs, mostly on the left leg, but the right leg is catching up.
I was diagnosed PMR in Nov. 2016. Was put on 20mg, Prednisone which relieved my symptoms within a day. Since then I reduced to 15mg, then 10mg, (and a short stint of 7.5mg which left me in pain - Rheumy's suggestion to get off the Pred more quickly... duh, nope), so I informed my GP and went back up to 10mg in Feb, '17, where I have been since. I'm still achy all the time, with bouts of random pain, roaming from shoulder to shoulder, upper arm muscles... but the new symptoms are these leg/feet cramps! Toes cramp into claws, locked in a frozen position, until I get up and walk... it's the only way I can force the muscles to stretch back out, is to put my weight on them and walk, and walk and walk.... Usually by 5 min later, they are gone and only an ache is left (lower legs are the same way). It's like "charley horse" cramps... they are so painful, and just in the morning as I awaken.
My leg/feet/toe cramps started about mid-May. First, I thought it was because I was over-doing swimming or too much walking... thinking lactic acid buildup... but it didn't ring true. Lactic acid from overworked muscles, wouldn't show up after 6-8 hours of sleep! And they seem to be getting worse. One morning I felt the cramp run from my toes, included my leg (left side this time) all the way to my pelvis, my hamstrings were like rocks! Incredible pain!
Three days later, I saw my Muscular Therapist, and told her of my leg cramps... she said my hamstrings were still hardened... and it was kinda painful when she worked on them, but she was able to relieve the most of the hardness to the muscles.
I just had my annual physical. My lab tests came back in normal ranges for potassium, magnesium and other blood parameters, except my cholesterol, which has been climbing higher over the last few years, just popped over into the "high" range.
Water is my favorite drink. Tea and coffee are my next faves. So I'm not dehydrated. Prednisone has added an extra 20 lbs "water weight" on me, and my joints are unhappy about it. I may have to see about a "water pill". I've just signed up with a nutritionist to help me with an anti-inflammatory, lower-my-cholestrol, lower carb, and lower my weight diet. Hope this will help, too.
I so understand about the muscle cramps. Not sure what to suggest, either. Tumeric in mustard really upsets my stomach so I'm not taking it anymore... it didn't help the morning leg cramps, either.
My next Rheumy visit is Dec 13. I may have to find some other Dr as she is often away at conferences, and only has 3 days a week appt's. Altho, she is very knowledgeable about PMR, I'd like a Dr. that is around more often than off for 2 weeks frequently for these events.
If anyone has suggestions... I'd be happy to try anything to rid of these leg/toe cramps!
Thx, marla