Compression pumps move excess fluid out of affected limbs and return the fluid to the cardiovascular system. Compression pumps treat lymphedema, venous insufficiency, and promote wound healing. Pumps are also effective in curing decubitus ulcers. As fluid leaves, your swelling subsides, promoting healing and comfort. Very often, you can use the pump at home after being instructed by a doctor or therapist. Pumps, used properly, can remedy a host of your issues when you use them as prescribed by your doctor or therapist.