Itching and running water in the ear is commonly seen in diseases such as inflammation of the external auditory canal, eczema of the external auditory canal and purulent otitis media. 1. Otitis externa: bacterial infections such as Staphylococcus aureus or mechanical stimulation can cause damage to the external auditory canal, resulting in inflammation of the external auditory canal. Inflammatory substances can continue to ooze out, which can be manifested in the ear as running water, itching and other symptoms. 2. Eczema of the external auditory canal: mainly caused by multiple factors of skin allergic reaction inflammation, can be manifested as itchy skin of the external auditory canal, flaking and other symptoms, accompanied by secretion oozing. 3. Purulent otitis media: purulent secretions in the middle ear flow from the tympanic membrane perforation, stimulating the skin of the external auditory canal, triggering symptoms such as itching, running water and pain in the ear. Itchy water in the ear may also be caused by fungal disease of the external auditory canal, etc. It is recommended to consult a doctor in time, and actively treat it after a clear diagnosis, so as not to delay the condition.