This causes swelling. The most intense swelling occurs in the ankle area and is followed by pigmentation and a feeling of heavy legs.
In this case, one or two cardiac chambers lose their ability to push blood effectively, which is why it is accumulated in the lower limbs.
Legs swell, and pain comes together with that.
Swelling of one or both legs may signal deep venous thrombosis. This problem is very dangerous. If you feel that you might have it, go to your doctor immediately.