If the ear hurts and flows, the following diseases are mainly considered clinically: the first one is eczema of the external ear canal with infection, which is mainly manifested by itching and pain in the ear, and yellow water inside the ear canal. The main clinical treatment is to apply anti-allergic ointment to the ear canal and take antihistamine orally for anti-allergic treatment, and anti-inflammatory and pain-relieving treatment with antibiotics. The second disease is purulent otitis media accompanied by pus flowing from the ear canal to irritate the ear canal, resulting in inflammation of the ear canal and thus a painful sensation. In this case, it is generally recommended to go to an ENT clinic, where the doctor will clean the ear canal, suck the pus out, examine the inflamed part of the ear canal, and check the size of the tympanic membrane perforation. In clinical treatment, while applying antibiotics for anti-inflammation, the ear canal can be cleaned regularly and local antibiotic ear drops can be applied for ear drop treatment. Generally speaking, it is mainly these two diseases, but of course, other diseases are not excluded.