How do i treat these blisters following orthopedic surgery?

See below: What i believe you are describing are called fracture blisters. They are due to excessive swelling of the soft tissue/skin. These blisters are usually sterile and generally after five days the bed has healed up below .Progressively they will disrupt. You can use hibiclens a surgical washing detergent . Note they can be particularly a problem around surgical incision sites and lead to infection. I would check with your physician/surgeon about these. Good luck thank you.