CSOM Chronic Suppurative Otitis Media Symptoms Causes Treatment and Surgery Guide

Ear discharge that keeps coming back is never normal. If your ear has been draining for more than two weeks, smells bad, or your hearing is getting worse, it could be Chronic Suppurative Otitis Media (CSOM)—a long-term middle ear infection that won’t heal on its own. Left untreated, it can lead to permanent hearing loss and serious complications. This guide explains CSOM symptoms, causes, diagnosis, treatment, and when surgery may be needed.

What Is CSOM?

Chronic Suppurative Otitis Media is a long-standing middle ear infection that has caused a hole called a perforation in the eardrum. Through this hole, bacteria enter the middle ear continuously, causing ongoing inflammation, chronic ear discharge, and progressive damage to the hearing structures.

Unlike a simple acute ear infection that clears with antibiotics in a week, CSOM persists. It doesn’t resolve without proper management. And the longer it continues untreated, the more damage accumulates.

CSOM is one of the most common causes of hearing loss that could have been prevented. In children especially, recurrent middle ear infections that go inadequately treated are a frequent starting point.

Doctors also classify CSOM as “safe” or “unsafe.” Safe CSOM means there’s a perforation but no cholesteatoma. Unsafe CSOM means cholesteatoma is present, which makes it more likely to cause serious complications. This is one reason a proper ENT examination matters you can’t tell the difference just by looking at the discharge. 

Globally, CSOM affects an estimated 65 to 330 million people, and around 60 percent of them go on to develop some degree of hearing loss. This burden falls heavily on children in developing countries, including India. 

What Causes CSOM?

• Untreated ear infections an ear infection that isn’t treated properly, or isn’t treated at all, can progress to eardrum perforation and chronic infection. This is one of the most common pathways to CSOM.
• Recurrent middle ear infections repeated infections weaken the eardrum and the surrounding tissues. Each episode increases the risk of permanent perforation and chronic ear discharge.
• Perforated eardrum once a hole forms in the eardrum, bacteria have a direct route into the middle ear. Chronic ear discharge becomes the result.
• Chronic sinusitis and upper respiratory infections persistent sinus and throat infections keep bacteria near the ear canal, increasing the risk of middle ear involvement.
• Weakened immune system children, elderly people, and anyone with conditions affecting immunity are more vulnerable to bacterial ear infection that becomes chronic.
• Poor ear hygiene inserting objects into the ear, water regularly entering the ear canal, and other hygiene issues create conditions that favour chronic infection.

Certain other factors also raise the risk. Living in crowded conditions, attending daycare at a young age, and having a family history of ear infections all increase the chances. Children born with conditions like cleft palate or Down syndrome are also at higher risk, since their ear structure drains less efficiently. 

The infection is usually caused by bacteria like Pseudomonas aeruginosa or Staphylococcus aureus, and sometimes fungi. This is exactly why a discharge culture test matters it tells the doctor which organism is involved, so the right treatment is chosen the first time. 

CSOM Symptoms What to Watch For

• Persistent ear discharge this is the defining symptom of CSOM. Chronic ear discharge that is thick, yellow, green, or foul-smelling ear discharge lasting more than two weeks. Why does my ear keep draining? In CSOM, the infected middle ear continuously produces pus that drains out through the perforated eardrum. It won’t stop with basic treatment. The WHO defines this as discharge lasting two weeks or more, though some specialists prefer to wait for six weeks before confirming CSOM, since some infections take a little longer to settle on their own. 
• Ear pain persistent ear pain that can worsen when chewing, swallowing, or lying down. In some cases pain is mild and intermittent. In others it is constant.
• Hearing loss this is what makes CSOM so serious. Conductive hearing loss develops as the infection and inflammation damage the eardrum and the tiny hearing bones in the middle ear. Initially mild. Progressively worse over time. Hearing loss due to ear infection in CSOM is often the symptom that finally brings patients to an ENT specialist.
• Tinnitus ringing in ears, buzzing, or a constant sensation of fullness in the ear. Tinnitus develops as the middle ear structures are affected.
• Ear fullness a blocked sensation in the ear that doesn’t clear, distinct from simple wax buildup.
• Fever in more advanced cases, fever alongside ear discharge and pain suggests the infection is spreading beyond the ear.
• Dizziness and balance problems when infection spreads toward the inner ear, balance is affected.

Red Flags That Need Immediate Medical Attention

Sudden worsening of hearing loss. Severe ear pain that escalates rapidly. High fever with ear discharge. Facial weakness or facial nerve paralysis a sign of serious spread. Swelling behind the ear this can indicate mastoiditis. Headache alongside ear infection symptoms. Confusion or neurological symptoms alongside chronic ear infection.

These are not situations to manage at home with ear drops. These need same-day ENT assessment or emergency care.

How CSOM Is Diagnosed

• Otoscopy ear examination an ENT doctor looks directly into the ear canal using an otoscope. This shows the eardrum perforation, the extent of discharge, and whether the middle ear is visible through the hole.
• Audiometry test hearing test a formal hearing test that measures the degree and type of hearing loss. Conductive hearing loss from CSOM produces a characteristic pattern on audiometry. This test is essential for understanding how much damage has already occurred.
• Ear discharge culture test the discharge is cultured in a laboratory to identify which specific bacteria are causing the infection. This guides antibiotic selection and prevents treatment with the wrong antibiotic.
• CT scan for ear infection detailed imaging of the temporal bone and middle ear. Identifies the extent of infection, whether mastoiditis is present, and whether cholesteatoma has developed. Essential when surgery is being considered.
• MRI for ear infection used in advanced cases when soft tissue involvement or brain complications need to be assessed.

CSOM Treatment What Works

• Antibiotic ear drops topical antibiotic ear drops are the first-line treatment. They deliver medication directly to the infection site and control bacterial ear infection effectively in many cases. The specific antibiotic is chosen based on culture results when possible.
• Ear cleaning aural toilet professional ear cleaning by an ENT specialist removes pus, infected debris, and crusts from the ear canal and middle ear. This step is critical. Without clearing the discharge, topical antibiotics can’t reach the infected tissue properly. Aural toilet significantly improves the effectiveness of medical treatment.
• Hearing assessment regular audiometry tests monitor whether hearing loss is stable, improving, or worsening through treatment.
• Myringoplasty eardrum repair surgery for smaller perforations. The hole in the eardrum is closed using a graft taken from tissue near the ear. This prevents further bacterial entry, stops chronic ear discharge, and allows the eardrum to function normally again. Myringoplasty significantly improves hearing in many patients with conductive hearing loss from CSOM.
• Tympanoplasty for larger eardrum defects and damage to the middle ear hearing structures, tympanoplasty repairs the eardrum and reconstructs the damaged ossicles the tiny bones responsible for conducting sound. Tympanoplasty is both a CSOM surgery and a hearing loss treatment addressing both the infection pathway and the hearing impairment simultaneously.
• Mastoidectomy when infection has spread into the mastoid bone behind the ear causing mastoiditis mastoidectomy is required to remove the infected bone tissue and prevent further spread. This is a more significant procedure but essential when mastoid infection is confirmed on CT scan.

Alongside medical treatment, a few home habits help. Gently wipe away any visible discharge from the outer ear using a clean, soft cloth. Never insert cotton swabs, buds, or anything else into the ear canal this can push infection deeper and damage the eardrum further. Keep the ear dry, and follow up with the ENT specialist as advised, even if the discharge seems to be reducing. 

What Is Cholesteatoma?

Cholesteatoma is a serious complication of chronic suppurative otitis media that deserves specific mention. It’s an abnormal skin growth that develops inside the middle ear through the perforated eardrum. Cholesteatoma isn’t cancerous but it is destructive. It erodes bone, damages hearing structures, destroys the ossicles, and can spread to the mastoid and beyond.

It requires surgical removal. And it’s one of the most compelling reasons to treat CSOM early rather than wait.

CSOM Complications When Left Untreated

How to stop ear discharge permanently requires treating the underlying CSOM. Without it:

• Permanent hearing loss progressive conductive hearing loss from ongoing middle ear damage becomes irreversible.
• Mastoiditis spread of infection to the mastoid bone behind the ear. Painful, serious, and requiring surgery.
• Cholesteatoma destructive skin growth that erodes the structures of the middle ear.
• Facial nerve paralysis infection involving the facial nerve causes weakness or paralysis on one side of the face.
• Brain abscess and meningitis in the most severe untreated cases, infection can spread intracranially. This is life-threatening.
• Balance problems inner ear involvement causes dizziness and vertigo. These aren’t rare worst-case scenarios. They’re documented consequences of chronic ear infection that goes inadequately treated over months and years.
• Tympanosclerosis scarring and thickening of the eardrum from repeated infection, which can further affect hearing even after the infection itself is controlled. 

CSOM Prevention What Reduces Risk

Treat ear infections promptly and completely don’t stop antibiotics early when symptoms improve. Complete the full prescribed course.

Keep ears dry when bathing, swimming, or washing hair, water entering a perforated eardrum directly reaches the middle ear and worsens infection. Cotton wool or custom ear plugs during water exposure significantly help.

Avoid inserting objects into the ear cotton buds, pins, and any other objects push bacteria into the canal and risk further eardrum damage.

Manage allergies and chronic sinusitis effectively reducing upper respiratory inflammation lowers the bacterial load near the ear.

Attend regular ENT checkups if recurrent ear infections are a pattern particularly for children with frequent ear infections and for anyone who has had a previous perforated eardrum.

CSOM in Children Why It Matters More

CSOM in children is particularly important to catch early. Hearing loss during childhood directly affects speech development, language acquisition, and academic performance. A child with significant hearing loss due to ear infection who isn’t identified and treated may struggle at school for years before the cause is found.

Chronic ear infection in children that keeps recurring, persistent ear discharge in a child, or a child frequently asking people to repeat themselves all of these warrant a pediatric ENT evaluation without delay.

Younger children may not complain of pain at all. Instead, you might notice them turning up the TV volume, sitting closer to the screen, or simply not responding when called from another room. These small behaviour changes are often the earliest clue. 

When Should You See a Doctor?

See an ENT specialist if ear discharge has been present for more than two weeks. If ear infections keep coming back. If hearing has noticeably worsened. If foul-smelling ear discharge is present. If tinnitus has developed alongside ear symptoms. If there is dizziness or balance difficulty. If there is fever alongside ear discharge.

An online ENT consultation through HealthPil is a practical first step when symptoms are present but not immediately severe to assess whether imaging or in-person evaluation is needed and what treatment is appropriate.

Book ENT consultation through HealthPil to speak with an experienced ENT doctor who can assess your symptoms, review any reports, and guide you on the right path from conservative management to surgery when it’s genuinely needed.

How HealthPil Can Help

HealthPil connects you with experienced ENT specialists who provide thorough assessment of CSOM symptoms, guide appropriate investigations like audiometry and CT scan, manage conservative treatment, and advise on when CSOM surgery myringoplasty, tympanoplasty, or mastoidectomy is the right step.

Whether you need a first opinion on ear discharge that won’t stop, or guidance on whether surgery is appropriate for your specific situation expert ENT care is available online from wherever you are. Book your online ENT consultation with HealthPil today.

Summary

CSOM is a chronic middle ear infection causing eardrum perforation, persistent foul-smelling ear discharge, and progressive hearing loss. It develops from untreated or recurrent middle ear infections and won’t resolve without proper treatment. Diagnosis through otoscopy, audiometry, and CT scan identifies the extent of damage. Antibiotic ear drops and aural toilet manage active infection. Myringoplasty and tympanoplasty repair the eardrum and restore hearing. Mastoidectomy is needed when infection spreads to the mastoid bone. Left untreated, CSOM causes permanent hearing loss, cholesteatoma, and life-threatening complications. If ear discharge keeps coming back see an ENT specialist now.