Post ankle surgery bimalleous fracture with two screws one side, plate and screws other side. Done 10/21/14. PT daily home. Skin tight both sides. Why?

Sounds like you have. Swelling in that area. Without knowing more about whether you have pain at your ankle or pain at your calf or other issues going on - and I can't see or examine your ankle - it's not clear if this swelling related to impaired venous/lymphatic drainage which can happened after surgery in that area, or if it's related to intrinsic joint issues or even a blood clot. Have your doc check it out.