Varicose veins are twisted, swollen superficial venous blood vessels, and usually occur in the lower limbs. What are the main causes of varicose veins?
Varicose veins can result from obesity and pregnancy, because the increased weight constricts the leg draining valves.
They may be caused by genetic factors, such as incompetent venous valves.
Varicose veins may be caused by increased build-up of blood, as a result of gravitational pressure and nonmoving legs (standing for long periods of time), as might occur in people who work as store clerks, hairdressers, and dentists, for example.
All of the listed responses are correct
All of the listed responses are correct.
Any condition that impacts the return of blood flow from the lower limbs to the heart results in increased build-up of blood, especially in the superficial blood vessels. The deeper veins do not usually develop varicosities because of the milking action of surrounding muscles and their contractions facilitating the flow of blood towards the heart.