The most common cause of palmar itching is generally considered to be limited pruritus, the cause of which may be related to psycho-spiritual factors, irritating diet, skin intolerance and other reasons, as the skin of the palm is more sensitive than other parts of the hand, so it is mostly found in the palm; in addition, palmar itching may also be pruritus with skin lesions, the causes of which include infectious skin diseases, allergic skin diseases and palmar manifestations of systemic diseases.