Itchy palms may be caused by non-disease factors, or it may be caused by pathological factors such as mosquito and other biting dermatoses, fungal infectious dermatoses, allergic diseases and so on. 1. Non-disease factors: such as exercise, high room temperature, hot baths, etc. caused by the skin temperature of the hands, stimulating peripheral nerves and thus the symptoms of itching palms. 2. Pathologic factors Mosquito bite dermatosis: such as mosquitoes, fleas, bedbugs, lacewings and other insect bites caused by insect bite dermatitis, etc., if the lesions appear in the palm of the hand by the inflammatory stimulation can cause local itching symptoms. Fungal infectious dermatosis: such as the palm of the hand infected with red trichophyton, scaly keratinized, macerated vesicles, blisters and other lesions, can be manifested as itching of the palm of the hand. Allergic diseases: hand eczema, can be divided into sweat herpes-like eczema, keratosis pilaris eczema, discoidal eczema, in which sweat herpes-like eczema is mostly seen in the palm of the hand, fingers and other parts of the hand, there can be itching of the palm of the hand; contact dermatitis, the palm of the hand can be allergic to contact with laundry detergent, soap and other irritants to produce a perverse reaction, the symptoms of itching. If the symptoms of itchy palms are difficult to relieve or even aggravate for a long time, it is recommended to consult a doctor in time to find out the cause and then actively treat it to avoid delaying the condition.