I m a 56 yr old cancer (Hodgkins) survivor. Had radiation and chemo in 1984. Several surgeries. MY spline, thyroid, gall bladder, complete hysterectomy and open heart surgery to repair different damages done by radiation. Now I find myself with my muscles cramping and sticking. If I open a jar my hand will stay curled for a few minutes until it releases, my toes do the same thing when I stretch to put on socks, now I am experiencing it with my hip when I get up, my arms when I put down something I have carried,etc. What would make my muscles do that. My internist seems unconcerned but my last blood work showed a high potassium count which is not normal for me. Any ideas?