my husband had hip surgery Sept 23 and has had nerve pain (sciatic) ever since...two weeks ago he had an epidural nerve block which alleviated much of the pain. but his feet (particularly his foot on the hip replacement side) have swollen. Now he has pins and needles in the foot which won't go away. Ice helps very little and his foot hurts just by brushing it with a blanket. what is this? what can we do?