Anyone can experience swollen feet from time to time. It's common - especially after walking or standing for long periods - and it's often remedied by resting and elevating those tired "dogs." But if it persists, you likely need to see a doctor because swelling (also called edema) can be a red flag for a more serious underlying problem, such as heart failure, deep-vein thrombosis (a blood clot ... 14 Reasons Your Feet Hurt and How to Find Relief - Verywell Health