My grandmother was recently discharged from the hospital and we noticed her hands and feer are now swollen , what can be the cause and how to fix it?

Primary care: Swelling of the hands and feet is often a symptom of a systemic problem, not specifically a problem with the hands/feet. It may be related to fluid balance, or heart function. Seek advice from the physicians who treated her in the hospital, or from her primary care provider. They could integrate her other medical problems with this particular symptom.