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<s>[INST] What causes Varicose veins? [/INST] In normal veins, valves in the vein keep blood moving forward toward the heart. With varicose veins, the valves do not function properly, allowing blood to remain in the vein. Pooling of blood in a vein causes it to enlarge. This process usually occurs in the veins of the legs, although it may occur elsewhere. Varicose veins are common, affecting mostly women. Causes include: Defective valves from birth (congenitally defective valves) Pregnancy Thrombophlebitis Primary varicose veins occur because of congenitally defective valves, or without a known cause. Secondary varicose veins occur because of another condition, such as when a pregnant woman develops varicose veins. </s>
<s>[INST] Who is at highest risk for Varicose veins ? [/INST] Standing for a long time and having increased pressure in the abdomen may make you more likely to develop varicose veins, or may make the condition worse. </s>
<s>[INST] When to seek urgent medical care when I have Varicose veins ? [/INST] Call for an appointment with your health care provider if: Varicose veins are painful They get worse or do not improve with self-treatment, such as keeping the legs elevated or avoiding excessive standing Complications occur, including a sudden increase in pain or swelling, fever, redness of the leg, or leg ulcers </s>
<s>[INST] What to expect if I have Varicose veins (Outlook/Prognosis)? [/INST] Varicose veins tend to get worse over time. You can ease discomfort and slow varicose vein progression with self care. </s>