The boil in the external auditory canal is not painful or itchy but has pus.
Jun 05, 2023
Source: Cainiu Health
Dr. Xu Gang
Introduction
Under normal circumstances, a painless and non-itchy boil in the external auditory canal with pus discharge may be caused by pathological factors such as acute suppurative otitis media, external otitis, or auricular pseudocyst. Patients can receive symptomatic treatment based on the specific cause. During treatment, smoking and alcohol should be avoided; patients should consume more fruits and vegetables and avoid spicy or irritating foods. With proper management, the above symptoms will gradually improve.
In general, a boil in the external auditory canal that is neither painful nor itchy but produces pus may be caused by pathological conditions such as acute suppurative otitis media, external otitis, or auricular pseudocyst. Patients should receive symptomatic treatment based on the specific cause. The details are as follows:
1. Acute Suppurative Otitis Media
Pus-like discharge from the external auditory canal is commonly seen in cases of acute suppurative otitis media. Otitis media usually occurs secondary to upper respiratory tract infections. Inflammation can travel retrograde through the Eustachian tube, leading to fluid accumulation and infection within the middle ear cavity. When inflammation becomes severe, it may result in tympanic membrane perforation, causing purulent discharge from the external auditory canal. The most common causative pathogen is Staphylococcus aureus. During the acute phase, anti-inflammatory treatment should be administered according to symptoms. Under medical guidance, patients may take medications such as amoxicillin capsules, cephalexin capsules, or roxithromycin capsules. All medications should be used strictly as prescribed by a physician.
2. External Otitis
External otitis includes diffuse external otitis and furuncles (boils) of the external auditory canal. An external auditory canal furuncle is an inflammatory condition of local hair follicles and sebaceous glands caused by bacterial infection. It often results from minor skin injuries due to ear picking, allowing bacteria to enter and cause infection. Under medical supervision, patients may take oral antibiotics such as azithromycin capsules or amoxicillin capsules for treatment.
3. Auricular Pseudocyst
An auricular pseudocyst typically forms when irregular pressure or trauma causes inflammatory exudate to accumulate between two layers of cartilage in the ear flap, resulting in a fluid-filled swelling. The area appears visibly swollen and raised, but is usually painless. For small pseudocysts, treatment may involve needle aspiration followed by compression dressing. If the pseudocyst is large or does not respond well to aspiration and compression, surgical windowing and drainage may be required.
Besides the above three conditions, other possible causes include external auditory canal papilloma, exostosis (bony growths), and cholesteatoma. It is recommended to seek timely medical evaluation and receive appropriate treatment under the guidance of a healthcare professional.
