Morphea (mor-FEE-uh) is a rare skin condition that causes painless, discolored patches on your skin. Typically, the skin changes appear on the abdomen, chest or back.But they might also appear on your face, arms or legs. Morphea tends to affect only the outermost layers of your skin.orphea. Morphea (mor-FEE-uh) is a rare skin condition that causes painless, discolored patches on your skin. Typically, the skin changes appear on the abdomen, chest or back. But they might also appear on your face, arms or legs.