Purple hands in the cold is considered to be caused by poor peripheral circulation or Raynaud’s syndrome. 1. Poor peripheral circulation: probably because of the cold weather, the human body blood vessels are more normal contraction, so that the blood flow rate slows down, which leads to poor blood circulation, especially at the end of the extremities of the blood circulation is more poor, so the hands can be seen in the cold purple situation. 2. Raynaud’s syndrome: some patients with idiopathic Raynaud’s syndrome are more sensitive to cold stimuli, so there may be a cold, pale, purple fingers during the attack, followed by flushing performance, so it can be seen that the hands are purple in the cold. This manifestation is often bounded by the metacarpophalangeal joints, with the progress of the disease may appear on the back of the finger hair disappearance, nail growth slow, deformation and other symptoms. If you encounter purple hands in the cold, recurring or progressive aggravation of the symptoms, it is recommended to consult a hospital as soon as possible for diagnosis and treatment by a professional doctor.