Area management of tissue sites on articulating joints

A dressing for treating an area around an ankle with negative pressure, the dressing comprising:

• a foam manifold comprising a stem, a first arm joined to the stem, and a second arm joined to the stem, the first arm comprising an arm extension for coupling to a fluid conductor, wherein the stem comprises foam having a higher density than the first arm and the second arm;
• an attachment device including a first surface and a second surface, the first surface coupled to a periphery of a tissue-facing side of the manifold, the attachment device comprising a treatment aperture configured to at least partially expose the manifold;
• a cover disposed over the manifold and coupled to the attachment device around the manifold;
• and
• an adhesive on the second surface of the attachment device configured to bond to the area around the ankle.