 [ Symptoms ] blood vessels in hands visible   there have been a couple times when all the blood vessels in my hands turned red and were clearly visible looking like there was a red net drawn on the back of my hands there was no pain associated with this but my hands are frequently very cold as they were during these occasions any idea what might have caused this  [ Disease ] most states require that children entering child care and school show evidence of immunity to chickenpox or evidence of having been given the chickenpox vaccine