My right leg has felt a lot of pressure all day under my knee there's no pain?

Leg "pressure" Dear Brittany, Is there swelling in your leg below the knee joint, specifically behind in the calf region? If so, call your physician. Clots in a leg can present with "pressure" behind the knee, and may not be painful. Also, if you are on contraceptives, risk for clots is higher. Make sure you contact your physician for a physical exam. Best wishes, Nisha.