I have swelling in the foot. what should i do?

Many causes: Prolonged sitting, standing, venous incompetence, congestive heart failure, arthritis, infection, trauma are common causes. Seek help of phlebologist at www.Phlebology.Org who can evaluate you and advise accordingly.

Yes...: Sometimes that happens. There can be many reasons ranging from local circulation to systemic disease. See your pcp.

Many possibilites: Some causes of swelling of the feet can include systemic problems such as hypertension, and problems with the kidneys and localized issues such as arthritis, infection, lymphatic obstruction, blood clots, varicose veins, trauma (fracture, sprain, and tendonitis) and side effects to medication. Have it evaluated by a professional and get the appropriate treatment.