This seems to happen quite frequently and I am concerned since someone told me it is a sign that a serious illness is in the near future. The muscles in my toes, specifically the 4th and 5th of either foot, tense up causing extreme discomfort. When that happens, they “stick” together and it is impossible to do anything. Sometimes when I jump on that foot for several minutes, the muscles relax and go back to their original state. Any idea what this is and why it happens?