The itchy running water and crusty recurrence of the external auditory canal needs to be treated according to its causes, such as fungal infection, external auditory canal eczema, otitis externa, and choose general treatment and medication after a clear diagnosis. 1. Fungal infections: fungal infections of the external auditory canal can cause itchy watery scabs in the external auditory canal repeatedly. Treatment can choose antifungal drugs, such as ketoconazole ointment, if necessary, with oral itraconazole. 2. Eczema of the external auditory canal: Eczema of the external auditory canal belongs to the skin allergic inflammatory reaction, which can show the itchy running water and scabs of the external auditory canal repeatedly. Treatment can choose budesonide cream, mometasone furoate cream for external use, if the itching is serious, can use glycerine lotion to relieve the symptoms. 3. otitis externa: otitis externa can also lead to otitis externa itchy running water scabs repeatedly, the treatment can follow the doctor’s instructions to use antibiotic drugs, such as mupirocin ointment, gentamycin ointment. There are many reasons for the itchy and crusty external auditory canal, the symptoms need to be timely medical treatment, the use of medication under the guidance of the doctor, not private treatment, so as not to lead to adverse consequences.