Swollen feet can be a problem caused by disease, or by lifestyle habits such as prolonged standing or sitting, or by adverse reactions to medication. Swollen feet can be a symptom of limited oedema or systemic oedema.
Conditions that can cause swollen feet include heart failure, nephrotic syndrome, mucinous oedema, oedematous hyperthyroidism, premenstrual tension syndrome, cortisolism syndrome, primary aldosteronism, and diabetes mellitus.