Swollen feet is fluid the cause.?

Fluid: Retention can be the cause.

Yes: The question is why are you retaining it? Options include bad valves in your veins, too much salt intake, possible cardiac or kidney problem, medication side effect etc. Becuase, there are many possible causes, best for a doctor to figure out the one causing your issue.

Generally yes but: Generally yes but there are more benign reasons such as gravity dependent edema or medications such as amlofipine...Talk ti your physician.

Swollen: As stated , there can be many causes for swelling. See your podiatrist and internist for the cause of the swelling