Varicose veins are enlarged veins that usually occur just under the skin (superficial veins). Varicose veins are likely to be caused by one or more factors, including:
• Increased pressure in the leg veins.
• Damage to the leg veins.
• Venous insufficiency.
Varicose veins often run in families. You may be born with defective valves or weak walls in your veins, or you may develop them later in life.
Varicose veins are more common in women than in men. And varicose veins happen more often as people get older.
Varicose veins often develop during pregnancy. They might become less prominent after pregnancy and may disappear completely.
Less commonly, varicose veins may be a sign of a more serious problem that may sometimes need treatment. These serious problems can include:
• Blood clots or blockage in the deep veins or perforating veins.
• Injury to the deep veins.
• Abnormal blood vessels between arteries and veins (arteriovenous fistulas). A person may be born with these problems or develop them later in life.
• Tumors (very rarely).
Read more: http://www.webmd.com/skin-problems-and-treatments/tc/varicose-veins-cause
” Dr Jeffrey Alpern, of Vein Specialists of Arizona, believes anyone with varicose veins should undergo a thorough venous ultrasound examination by a qualified Vein Specialist, to ensure there is no serious underlying venous disease which may be the cause and if left untreated may lead to more serious medical conditions such as bleeding, blood clot, skin pigmentation or ulcer formation.”

Vein Specialists of Arizona (VSA) and Jeffrey Alpern, D.O. Jeffrey Alpern, D.O., founder/owner of VSA, is one of a handful of surgeons worldwide to use fast, virtually painless, safe and effective laser ablation and radiofrequency (RF) techniques for the treatment and cure of existing varicose veins, chronic venous insufficiency and venous leg ulcers.