Underarm peeling with white flaky itch may be caused by eczema, ringworm and psoriasis. 1. Eczema: because of underarm sweating, friction, can cause the occurrence of eczema, may appear itchy symptoms, in the patient scratching, there will be the phenomenon of peeling skin, presenting white flaky skin. 2. Ringworm: due to the dampness of the armpit, it can cause fungal reproduction, thus causing ringworm, often manifested as red spots, white scales, itching and other symptoms. 3. Psoriasis: it may be caused by genetic factors or environmental factors, etc. It will appear as red plaques covered with silvery-white scales and accompanied by itching, burning and other sensations. When the patient’s underarms appear peeling with white flaky skin and itching, it is recommended to go to the hospital for examination and diagnosis in time, and under the guidance of the doctor for treatment.