about four months ago I had a muscle twitch in my leg, about three days after returning from Afghanistan. The twitch lasted about three days and went away. Several days later I started getting random twitches in legs arms, feet, and less often my shoulder blades. I now how pins and needles in my hands and feet which has persisted for about three days. The symptoms seem to go away when I am active and return when I am at rest. Should I be concerned?