Pus body in the ear may be caused by purulent otitis media, otitis externa and boils on the external ear canal. 1. Suppurative otitis media: Suppurative otitis media is usually secondary to an acute upper respiratory tract infection, which can lead to perforation of the tympanic membrane and pus flow when the inflammation is severe. Patients usually have headache, ear pain, hearing loss, tinnitus and other related symptoms. 2. Otitis externa: Otitis externa is mainly caused by repeated pulling out the ear or entering dirty water into the external ear canal, which causes the skin barrier of the external ear canal to break down and bacteria to invade the external ear canal. Patients may experience swelling and pain in the external auditory canal, and in severe cases, purulent fluid may ooze out. 3. Boils in the external auditory canal: boils form in the external auditory canal, and the common clinical symptoms are severe throbbing pain in the affected ear, and pain that worsens when opening the mouth or chewing. When the boil bursts, pus will overflow and a purulent discharge from the ear will appear. When the patient appears to have a pus body in the ear, he should go to the hospital in time to do the relevant examination to make a clear diagnosis, and under the guidance of the doctor to carry out treatment.