Acute Otitis Media in Patients with Tympanostomy Tubes

Key facts

• When someone with tympanostomy tubes (grommets) develops acute otitis media, bacteria reach the middle ear through the tube rather than being trapped behind the eardrum.
• The main sign is painless ear discharge (otorrhoea), often starting within 48 hours of water exposure such as swimming or bathing, rather than the pain and pressure typical of standard ear infections.
• Treatment is topical: ciprofloxacin combined with dexamethasone ear drops target the infection and calm inflammation directly at the site, without the need for oral antibiotics.
• See a doctor if discharge is blood-streaked, lasts beyond a week of treatment, or comes with facial weakness or vertigo.

What the discharge tells you

Otorrhoea that appears within 48 hours of water exposure, swimming, bathing, or heavy rain, is the typical presentation. The fluid is usually yellow or white and may be odourless or mildly smelly. Fever is less common than in standard acute otitis media, and the ear is rarely tender to touch. Blood-streaked discharge, symptoms persisting beyond a week of treatment, or new facial weakness or vertigo call for prompt medical review.

Treating infection through the tube

Topical antibiotic drops are the mainstay of treatment. A combination of ciprofloxacin and dexamethasone targets the bacteria most often responsible, Pseudomonas aeruginosa and Staphylococcus aureus, while the anti-inflammatory component settles swelling in the canal. The drops go directly into the ear canal, where they pass through the tube to reach the infection site. Keeping water out of the ear during treatment reduces re-exposure and speeds recovery.

When to see a doctor

Persistent, blood-streaked, or worsening discharge despite treatment needs a follow-up appointment, as does any accompanying facial weakness, dizziness, or vertigo, which can signal a deeper infection.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.