10 year old cast for ? break in growth plate. Told to have cast removed in 7 days. Told after 7 days that should remain on for 3 wks. Returned to remove cast and told could not see a break. But ? could of been a break in growth plate. Cast removed ankle painful on examination. Told to return in 4 wks. Leaving and leg was turning bluish from knee to toes . Noticed also when cast was on the toes was bluish in colour and told to elevate . Told to go to Physiotherpy . Attend same day. Later. as soon as foot is in normal position standing it then again turning bluish . Soon as it is elevated come back to normal colour. Was told by er doc this sometimes happens when cast is removed. It is unexplained. Ask when should we be concerned and was told it could remain like this . My question the child only stands for approx 5 min and the foot and leg darkens. This is not good circulation . I am very concern and confused by this all