Running water and crusting on the outer auricle of the ear may be related to factors such as auricular eczema, auricular skin infection and preauricular fistula. 1. Auricular eczema: Auricular eczema is often caused by repeated friction, contact with dirty water or local allergies, etc. Under the stimulation of immune factors or inflammatory factors, the external auricle will show symptoms such as localized skin thickening, localized itching, running water and crusting. 2. Auricular skin infection: when the outer auricle skin due to viruses, bacteria and fungi and other pathogenic microbial infections such as cellulitis and other diseases, can also cause the outer auricle of the ear running water, scabs. 3. Pre-auricular fistula: a few people in the auricle of the triangular fossa or the auricular cavity of the long infected or secretory ear fistula, can appear in the auricle of the ear running water, crusting situation. If you have a watery, crusty ear, you should go to the regular hospital to find out the cause of the disease, and choose the appropriate method of treatment under the guidance of a professional doctor.