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My mother-in law has lymph edema in her arms and hands. Is there any relief? - compression gloves

Heart problems and mastectomy on the left, "Mom" continue with chemotherapy and severe edema in the hands and arms. His right arm is like an arm manicans dark brown. We can not bend your elbows and has no use for them than ever before in his wrist and fingers rab stiff and swollen. The left arm is a little less swollen, but a little hand is slightly bent with limited mobility and use of the wrist and elbow, leans a little more.
She wears stockings "weapons and compression gloves for hands, but all PT and elevation and compression seems to be little or no good.
We note sowly their decline into depression () on medication for depression and are concerned about this situation begins to give up. I look for things you can do, as well as support for the arms and hands.
You can not go very far (bath) before it completely out of breath.
It is used to crochet and cross stitch.
PLEASE HELP