Itchy red patches on the palms of the hands, the possible clinical causes are urticaria, keratosis pilaris, tinea versicolor and so on. 1. Urticaria: This condition refers to a kind of edematous mass confined to the surface of skin and mucous membrane, and the clinical manifestation is that the affected area appears with itching and angioedema of different sizes. The manifestation of the disease is an acute attack, and the attack time is relatively short, and can disappear after a few hours. 2. Keratotic eczema: this is a kind of eczema, which is mainly due to the local skin long-term chronic inflammation stimulation and caused by the clinical manifestations of the palm of the hand parts of the red, hard, hypertrophic patches, and itching, pain and other symptoms. 3. Ringworm: the disease refers to the fungal infection of the superficial skin of the hand caused by dermatophytes, and its main involved parts are the palm of the hand, the thumb, etc., clinical manifestations for the affected areas of itching, pain, flaking. It is recommended that people with related conditions should go to the dermatology department of regular hospitals to get a clear diagnosis, so as to carry out targeted treatment.