The most common cause of constant pus in the ear is acute suppurative otitis media accompanied by perforated eardrum or chronic middle ear mastoiditis with long-term recurrent pus flow. For the treatment of acute suppurative otitis media, first of all, cold prevention, anti-inflammatory and anti-infection treatment should be given. Amoxicillin or cefuroxime sodium tablets can be considered, together with the nasal spray drug Cochlear or Nesuna, plus the drug Mucosolvan or Chenault, as well as cleaning the purulent secretions in the external ear canal to achieve smooth drainage and promote healing of the lesion. If chronic middle ear mastoiditis is the cause, after standard treatment, if the inflammation can be controlled, conservative treatment is the main treatment for the time being; if it does not heal for a long time, surgical treatment can be considered.