I Have Experienced What I Would Call Almost A Very

I have experienced what I would call almost a very brief paralysis in my lower back/legs several times in the past month. It is almost a flushing feeling, like the blood has all rushed to that part of my body. It is not painful. It has only lasted a matter of seconds the several times it has happened. It has always followed a period of sitting for several minutes. I am 71 years old and I take multiple medications each day, primarily for cardiac issues. I have also been diabetic for more than 40 years.