It is normal to have some swelling after an injury. But if a
large area of swelling occurs within 30 minutes of an injury, the swelling may
be a sign of:
A more serious injury.
Swelling (edema) in the feet and ankles is common after you have been
sitting or standing for a length of time. It is also common during hot or humid
weather. Sitting or lying down with your feet propped up often relieves this
type of swelling.
Swelling does not get
better when you prop your feet up.
Swelling develops suddenly or
gets worse in the feet or ankles of people who have
heart failure, liver disease, or kidney disease.
Kidney, heart, or circulatory problems may cause ongoing swelling of one or