Pain inside the ear may be related to acute diffuse otitis externa, external auditory canal boil, herpetic tympanitis, acute suppurative otitis media and other causes. 1. Acute diffuse otitis externa: due to the infection of pathogenic bacteria such as hemolytic streptococcus, it can cause inflammatory reaction in the ear canal, with burning, swelling and pain that gradually intensifies. 2. External auditory canal boil: If staphylococcus and other purulent bacteria infect the folliculitis, it can cause local inflammatory reaction and the phenomenon of pain inside the ear. 3. Herpetic tympanitis: Inflammation of the tympanic membrane caused by viral infection often affects the deep skin of the external auditory canal adjacent to the tympanic membrane, which can cause painful symptoms. 4. Acute purulent otitis media: Inflammation of the middle ear cavity caused by bacteria and other pathogens multiplying in the middle ear, often with symptoms such as earache, fever, and discharge of sticky, yellow or blood-red fluid from the ear. It is recommended that people with pain inside the ear go to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.