Do you have such strange symptoms? The back of the hand, palm and the back of the foot appear light white spots, 2-4 mm in diameter, when the upper limb drops for a period of time after the back of the hand, forearm light white rash more obvious; lifting the upper limb or rubbing the symptoms quickly subside. In fact, this is a disease, this disease is called “Marshall-White syndrome”, English name “Marshall-White syndrome”, also known as Bier anemia spot, the end of the limbs more obvious, is a congenital vascular development problems, generally It does not require treatment and does not affect the health of the body. The disease is caused by plant nerve dysfunction and vasodilator dysfunction. When the arm is raised, the color of the white spots will fade to the same color as normal skin tone because the blood in both normal and abnormal blood vessels flows back to the heart, and will appear again when it is lowered. It does not cause organ dysfunction and has no effect on daily life, so it does not require treatment. At present, there is no special medicine, but the relief method can take glutathione and blood-stasis activating drugs.