On January 23rd, I had a left total knee replacement. Since the surgery, especially at night, my left foot seems to drop forward and, as I m sleeping, my whole leg tends to fall inward causing intense pain in my left arch. I have wrapped an ace bandage around the arch, attaching it to the opposite headboard to hold my foot in place which seems to help. Is this a common problem and will it eventually go away as my knee heals. I usually sleep on my stomach and now need to sleep on my back because of the surgery. Thank you.