varicose veins
Condition in which the veins become swollen and twisted. The veins of the legs are most often affected; other vulnerable sites include the rectum (haemorrhoids) and testes.
Some people have an inherited tendency to varicose veins, and the condition often appears in pregnant women, but obstructed blood flow is the direct cause. They may cause a dull ache or may be the site for thrombosis, infection, or ulcers. The affected veins can be injected with a substance that causes them to shrink, or surgery may be needed.
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