How do you reduce post surgery swelling in hand?

It depends upon the cause. You would need to be more specific. Also, do consult with a physician.

If you are noticing edema in the arms and feet you may have non-pitting edema. However, Edema can be caused by a multitude of diseases or complications from said diseases. Typically edema is present in people with Hypertension (High Blood Pressure) or people with CHF (Congestive Heart Failure). There are many more reasons that can cause swelling but as mentioned above it is always better to consult your doctor to have tests run.