Purple palms may be due to peripheral circulation due to ischemia, can be seen in the following cases: 1, respiratory diseases: respiratory diseases such as bronchitis, pneumonia, chronic obstructive pulmonary disease, etc., can lead to ventilation dysfunction, which leads to a reduction in the amount of oxygen into the bloodstream, the reduction of oxygen content in the blood and hemoglobin combined with hemoglobin oxygenated hemoglobin content will be lowered, which will make the hearts, lips, nail beds and other places purple. Heart disease: various heart diseases such as myocardial ischemia, heart failure, etc., can lead to poor heart pumping function, thereby reducing the blood supply to the periphery, peripheral ischemia leads to purple palms. 3, vascular disease: such as atherosclerosis of the limbs, thrombophlebitis, etc., which can lead to narrowing of the blood vessels, the end of the blood supply is insufficient, resulting in hypoxia. 4, cold: the cold environment can lead to poor peripheral circulation caused by vascular contraction. Shrinkage leads to poor peripheral circulation, such cases of purple palms can be improved after entering a warm environment. The above are common causes of purple palms, it is recommended to go to the hospital in time.