Otitis externa pus flowing out does not mean it is almost done. Otitis externa can be categorized into two types: limited and diffuse, with the former manifesting as boils on the external auditory canal and the latter as diffuse inflammation of the skin and subcutaneous tissues of the external auditory canal, with Staphylococcus aureus as the main causative organism in both. The boils can burst and cause pus to flow out, which does not mean that the condition is getting better. The common causative organism in the elderly and diabetic patients is Pseudomonas aeruginosa, and the onset of the disease is often accompanied by severe ear pain and ear leakage with a long course. In severe cases, it can invade the infratemporal fossa and the skull. Therefore, if you have otitis externa, you should seek medical treatment in time to avoid delaying the condition and causing serious consequences.