In fact, the treatment of otitis externa should be timely, otherwise it will cause other hazards. The main symptoms are itchiness, pain, swelling and some, epidermal erosion and other plasma secretions, which then turn into plasma or purulent secretions when the skin is usually prone to swelling and the eardrum is obscured, causing hearing loss and thus conductive deafness and tinnitus. 2. Acute otitis externa can easily turn into chronic Usually some acute otitis externa can slowly turn into chronic disease, mainly due to some ear digging, incorrect way, drug stimulation and some purulent otitis media triggering, etc. caused by acute otitis externa disease. Acute otitis externa can turn chronic if not treated in a timely or appropriate manner. Once the acute otitis externa, it can be extended to chronic otitis externa. 3, alert to some other diseases, such as otitis media, diabetes Sometimes the skin of the external auditory canal is damaged or some local resistance is found to be reduced, which can easily trigger otitis externa, like some patients with diabetes, which can easily lead to recurrent attacks of otitis externa. Other diseases such as chronic suppurative otitis media, anemia, vitamin deficiency, and diabetes can also lead to otitis externa.