A seemingly innocuous daily routine—cleaning the ears with cotton swabs or metal picks—has been linked to a rare but devastating cancer, with multiple cases in China forcing patients to undergo full ear removal. Medical experts warn that chronic trauma to the ear canal can trigger malignant transformation, urging the public to abandon aggressive cleaning practices and embrace the ear’s natural self-cleaning mechanism.
For many, the satisfying sensation of scratching an itch deep inside the ear is irresistible. Yet that fleeting pleasure may come at a catastrophic price. In Ningbo, China, a 75-year-old woman who had habitually dug at her ears for 16 years—even when no itch was present—arrived at hospital complaining of hearing loss. Doctors discovered a 3.5-by-2-centimetre ulcer in her left ear canal that had eroded through the skin, exposing the underlying cartilage. She was diagnosed with squamous cell carcinoma of the external auditory canal, a rare malignancy. The cancer had already spread to her parotid gland and cervical lymph nodes, leaving surgical removal of the entire left ear as the only viable treatment.
A similar fate befell a 50-year-old man surnamed Chou. After more than a decade of daily ear picking—often until he drew blood—he experienced severe pain and pus discharge from his left ear. The diagnosis was identical: squamous cell carcinoma of the ear canal.
How Ear Picking Fuels Cancer Development
Dr. Zhang Jinfang, an otolaryngologist at Taichung Hospital under Taiwan’s Ministry of Health and Welfare, explains that while external auditory canal cancer is uncommon, chronic over-cleaning is a primary driver. The mechanism is straightforward:
- Repeated injury and repair: Each scratch or scrape damages the delicate skin lining the ear canal. The body’s constant attempts to heal these wounds create an environment where cell mutations can arise, eventually leading to malignancy.
- Thin skin, deep invasion: The skin of the ear canal is exceedingly thin—only about 1 mm thick. Cancer cells can quickly penetrate into the underlying bone, making surgical removal much more radical, often requiring excision of part of the temporal bone.
- Poor blood supply hinders treatment: The ear region has limited blood circulation, so chemotherapy drugs struggle to reach the tumour. This contributes to a higher mortality rate compared with many other cancers.
Before full-blown cancer sets in, patients typically experience a stage called malignant external otitis, characterised by persistent pain, itching, and a significant discharge of fluid or pus. Dr. Zhang emphasises that catching the condition at this stage—and treating it with appropriate antibiotics to allow the tissue to heal—can prevent progression to cancer.
The Right Way to Care for Your Ears
The simplest prevention strategy is to leave your ears alone. Dr. Zhang Jian, from the Ningbo Medical Center, stresses that earwax (cerumen) is not waste. It protects the skin, traps debris, and gradually migrates out of the ear canal on its own through everyday jaw movements like chewing, yawning, and talking.
Expert-Approved Ear Care Guidelines
- Daily cleaning: None required. The ears are self-cleaning.
- When itchy: Use a clean, dry cotton swab only on the outermost part of the ear—never insert it deep into the canal. Gently dab, do not scrape.
- Forbidden practices: Avoid metal ear picks, fingernails, or any sharp objects. Never dig forcefully or repeatedly.
- When to see a doctor: If itching persists for more than three days, or if you notice a blocked sensation, bleeding, or discharge, consult an otolaryngologist immediately.
The tragic stories from Ningbo serve as a stark reminder that what feels satisfying in the moment can have irreversible consequences. By respecting the ear’s natural design and resisting the urge to pick, we protect not just our hearing but potentially our lives.