Can i use voltaren (diclofenac) gel for edema?

Maybe: If the edema (swelling) is around a small joint like the joints of the hand - then it may be effective, as the edema may be a sign of inflammation, and voltaren (diclofenac) gel is an anti-inflammatory gel. If it the edema is located over a larger joint it may be less effective.

No: Nsaids (like voltaren) can sometimes cause / contribute to edema. Try elevation / compression (snug clothing, etc.). See dr if not improving.

No!: It does not improve edema!