Normal liver function but red palms may be hot and cold stimulation, extrusion and other physiological factors, but also may be tinea versicolor, true erythrocytosis and other pathological factors. 1. Physiological factors: usually after the hands are stimulated by too cold or too hot, the redness of the palms may appear; the hands are subjected to prolonged extrusion, etc., can also be manifested as normal liver function but the palms of the hands are red, which is mostly a normal physiological phenomenon. 2. Tinea pedis: usually caused by fungal infection, and related to the humid and hot environment. Early patients do not have characteristic symptoms, with the development of the disease, blisters, scales, etc., tearing off the wall of the blisters, there will be bright red vesicles, itching obvious. The performance of the liver function is normal but the palms of the hands are red. 3. True erythrocytosis: the cause of the disease is not clear, and it is considered to be related to uncontrolled tumor proliferation of stem cells, gene mutation of hematopoietic stem cells, and enhanced sensitivity of stem cells to erythropoietin. Patients often have symptoms such as headache, tinnitus, dizziness, etc. They may also have red palms and itchy skin, which are manifested as normal liver function but red palms. It is recommended that patients with normal liver function but red palms should first exclude physiological factors, and if caused by disease factors, the cause of the disease should be clarified and treated under the guidance of specialized physicians.