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This is very common condition but the extent and causes are variable ranging from mild oedema to extensive lymphoedema.
Tests are undertaken to determine the cause which can be general such as heart failure, but usually arise from the leg problems such as vein problems including varicose veins or problems with the lymphatics.
Management involves improving the initial cause such as varicose veins, and controlling the swelling by wearing different types of support hoisery (www.pebbleuk.com) and having lymphatic massage.
Only very rarely, in extensive cases is surgery indicated.
For a more detailed review on swollen legs see our blog article