Yellow water flowing in the ear, accompanied by odor, is usually found in two reasons: First, the related symptoms caused by acute otitis externa. This is due to repeated ear pulling and long-term spicy stimulation of diet, resulting in chapped skin and exudation of external auditory canal. Generally, it is light yellow inflammatory exudate, which can cause swelling and obvious pain of external auditory canal. In the treatment, firstly, neomycin ointment is used for local external use, and at the same time, anti-inflammatory drugs are taken orally, which can be cured in about a week. During the treatment, don't eat spicy food, quit smoking and drinking. Second, the related symptoms caused by the onset of suppurative otitis media. This is due to acute inflammatory infection leading to effusion in middle ear cavity, perforation of tympanic membrane, pus in external auditory canal and peculiar smell. Patients may have fever, earache and headache. During the examination, a circular perforation can be seen in the tension part of the tympanic membrane, and pus overflows from the perforation. Treatment requires infusion therapy, such as cefazolin sodium and ceftriaxone sodium, and external ear needs local application of ofloxacin ear drops, which can be cured after more than a week, and surgery is needed if necessary.