High calcium/low magnesium?

I was wondering if there is a connection between high blood calcium and low magnesium. I've read a lot of mixed into, some say low calcium is connected to low magnesium but others say low magnesium doesn't let your body use calcium as well. My calcium level is still considered normal but it's on the higher end, and my parathyroid is normal so there's no real explanation for it. I haven't had my magnesium checked but I do have a lot of symptoms of a deficiency.