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NORMAL
CIRCULATION AND VARICOSE VEINS
Blood
is carried away from the heart by arteries and is returned to the heart by
veins. There are two networks of veins in the legs, which return blood to
the heart. The deep veins in the legs carry 90% of the blood to the heart.
These veins do not become varicose because the muscle layers, which
surround them, protect the walls of these veins. The surface or
superficial veins carry 10% of the blood returning to the heart. The
surface veins are the only veins, which can become varicose. Varicose
veins, or varices, are enlarged, visible surface veins, which are located
directly beneath the skin. These varicose veins are no longer able to
function properly and other normal veins have taken over for them.
Varicose
veins are a hindrance to the circulation. Treatment of varicose veins aims
at improving the circulation.
LEG
PAIN AND VARICOSE VEINS
Varicose
veins are the leading cause of leg pain in an otherwise healthy adult
population. Varicose veins are more painful while they are forming because
the walls of these veins are stretching. The pain can often be a burning
sensation. The pain can subside for several years once the walls of the
veins have stretched beyond their elasticity. At this time, heaviness
rather than pain can be felt. Female hormones have an effect on varicose
veins resulting in some women experiencing greater pain before and during
menstruation and during pregnancy. Other forms of discomfort experienced
with varicose veins can be night cramps, "restless legs", which
cause the individual to shift leg positions frequently, and pain while
standing or walking.
SPIDER
VEINS (TELANGIECTASIAS)
Spider
veins are tiny, thread-like purplish-blue or red veins seen close to the
surface of the skin. Spider veins are usually the result of larger
underlying veins, are generally painless and do not lead to medical
complications.
RETICULAR
VEINS
Reticular
veins are turquoise-blue veins seen through the skin in areas of stretch
(knees, etc.). When they become varicose they can cause sharp pains which
can be pinpointed on the legs. Reticular veins cannot lead to medical
complications.
COLLATERAL
VEINS
Collateral
veins are large veins. When they become varicose they can pool a large
volume of blood. They are often the cause of heaviness in the legs.
Collateral (or truncular) varices lead, in time, to medical complications.
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CAUSES
OF VARICOSE VEINS
Heredity:
90% of varices are inherited from direct relatives.
Acquired:
10% of varicose veins are caused by an injury, an inflammation or from a
deep venous thrombosis (blood clot).
Other
causes: Other factors which can indirectly induce the formation of
varicose veins are obesity, pregnancy, old age, excessive heat including
prolonged exposure to the sun, prolonged standing, constricting clothing
and girdles, and disorder of the lower limbs and feet. These factors
should be controlled to prevent varicose formation.
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