Acute otitis media can be divided into acute secretory otitis media and acute purulent otitis media. 1. Acute secretory otitis media: It is a non-suppurative inflammatory disease, mainly characterized by fluid accumulation in the middle ear and hearing loss. Patients mostly have a history of cold before the onset of the disease, followed by ear pain and hearing loss, which may be accompanied by a sense of self-hearing enhancement. Preschool children show symptoms such as ignoring their parents’ calls, lack of concentration, and high volume while watching TV. In addition, patients with acute secretory otitis media may also experience a sense of occlusion or stuffiness in the ear, as well as intermittent tinnitus. In adults, when the head moves or when yawning or blowing the nose, symptoms such as the sound of air passing through water in the ear may occur. 2. Acute purulent otitis media: The main symptoms are ear pain, tinnitus, hearing loss, and bloody or purulent fluid flowing out of the ear, and severe ear pain can lead to sleepless nights, irritability, and crying in infants and children. It is also accompanied by systemic symptoms such as chills, fever, lethargy and loss of appetite, and pediatric patients may have high fever, convulsions, vomiting and diarrhea. In summary, the symptoms of acute otitis media mainly include ear pain, tinnitus, hearing loss, ear overflow, and may be accompanied by systemic symptoms such as fever, lethargy, loss of appetite, crying and fussiness in infants and children, and even convulsions and vomiting.