Who Are at High Risk of Excessive Blood Clotting?

Many factors can lead to excessive blood clotting, leading to limited or blocked blood flow. Blood clots can travel to the arteries or veins in the brain, heart, kidneys, lungs and limbs, which in turn can cause heart attack, stroke, damage to the body’s organs or even death.

Acquired Risk Factors

Overweight and obesity
Prolonged bed rest due to surgery, hospitalization or illness
Long periods of sitting such as car or plane trips
Use of birth control pills or hormone replacement therapy

Genetic Risk Factors

The genetic, or inherited, source of excessive blood clotting is less common and is usually due to genetic defects. These defects often occur in the proteins needed for blood clotting and can also occur with the substances that delay or dissolve blood clots.

You’re more likely to have a genetic cause of excessive blood clotting if you have:

Family members who have had dangerous blood clots
A personal history of repeated blood clots before the age of 40
A personal history of unexplained miscarriages

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