It's a little cold, with purple nails and shortness of breath.

Patients often suffer from colds or finger contact with low temperature, and some are induced by emotional excitement and mental tension. The characteristic of its attack is that the skin color of toes suddenly turns white, then turns blue-purple, and then turns to flush, showing intermittent attacks. Fingers are more common than toes. The attack usually begins at the tip of the little finger and ring finger, and gradually spreads to the whole finger or even the palm with the progress of the disease, but the thumb is rarely affected, accompanied by local chills, numbness, tingling, soreness and discomfort or other abnormal feelings. The body and local temperature drops from time to time, but the radial artery or dorsal foot artery beats normally. At the first attack, the attack time is mostly a few minutes to half an hour, which will relieve itself. When the skin turns to flush, it is often accompanied by burning and tingling, and then turns to normal color. If local heating attacks, rubbing the affected limb and waving the affected limb can stop the attack. When the disease progresses, the symptoms get worse and the attacks are frequent, each attack can last for more than an hour, and sometimes it is necessary to immerse your hands and feet in warm water to stop the attacks.

Chinese medicine believes that it is purple and black, and it is cold. If female patients have cold hands and feet, white wax at the fingertips, and then cyanosis, accompanied by dizziness, chills, low appetite, pale color, pale tongue with white fur and heavy pulse, which are more common in women with low metabolism or weak body, Wenjing decoction can be given to warm meridians to dispel cold, remove blood stasis and nourish blood.