Some herbal diuretics that may be useful for edema are bilberry, grape seed extract and dandelion, notes the University of Maryland Medical Center. Because these herbs can cause interactions with certain medications, it is advisable to speak with a doctor before using any herbal supplements for this medical condition.
Bilberry extract may be useful as an antioxidant and for fluid retention, but patients that take blood thinners should not use it, states the University of Maryland Medical Center. There is some clinical evidence that grape seed extract may help with venous insufficiency, a condition in which blood cannot flow properly from the legs to the heart. Venous insufficiency can cause leg swelling, states the National Institute of Health's MedlinePlus. However, this herbal extract can also interact with blood thinning medications.
Edema is a condition in which fluids accumulate in different parts of the body due to causes that include underlying medical conditions, allergic reactions and some medications. Treatment for this condition can require addressing any underlying condition, prescribing diuretics, using compression bandages and changing dietary habits, such as lowering salt intake.