Treatments: Mastoiditis

This page describes how mastoiditis is treated, from antibiotics and ear tubes to mastoidectomy, and what recovery involves.

Mastoiditis is an infection of the mastoid bone just behind the ear, most often a complication of a middle ear infection. It can occur in children and in adults. This page describes how acute mastoiditis (a sudden infection) and chronic mastoiditis (a long-standing or recurring infection) are treated, and what treatment and recovery usually involve. The condition itself is described on the mastoiditis conditions page.

Treatment Goals

Treatment aims to clear the infection, relieve symptoms, drain any trapped pus and prevent the infection from spreading to nearby structures such as the inner ear, the facial nerve or the brain. Most cases are treated successfully, and serious complications are uncommon. Care is usually shared between a hospital medical team and an ear, nose and throat (ENT) specialist, who is involved early to decide whether surgery is needed.

When Imaging Says "Mastoiditis" but There Is No Infection (Incidental Mastoid Effusion)

Sometimes a CT or MRI scan done for an unrelated reason, such as a headache, head injury, dizziness or cancer staging, notes "fluid in the mastoid," "mastoid opacification" or even "mastoiditis." Very often this is simply fluid or mucosal swelling in the mastoid air cells and does not mean a true mastoid infection is present. This finding is common, especially in young children, and in studies of people whose scans showed this fluid, the large majority had no infection of the mastoid at all.

The most common reasons for this harmless fluid are a cold or recent upper respiratory infection, allergies, or poor drainage of the ear through the Eustachian tube (see Eustachian tube dysfunction). It can also appear after a past ear infection or in people who have been on a breathing machine. True mastoiditis is a clinical diagnosis based on symptoms and examination findings such as ear pain, fever, and redness, tenderness or swelling behind the ear, not on an imaging report alone.

• No antibiotics are needed when there are no ear symptoms or examination findings of infection. The fluid is not an infection that requires treatment.

• No surgery or ear tube is needed for an incidental finding alone.

• The fluid usually clears on its own as the cold resolves or ear drainage improves.

• An ENT evaluation is worthwhile only if there are actual ear symptoms, such as ear pain, drainage, hearing loss or swelling behind the ear, so the finding can be matched to the examination.

The rest of this page describes the treatment of true mastoiditis, meaning a mastoid infection confirmed by symptoms and examination.

Antibiotics

Antibiotics are the foundation of treatment for almost every case of true mastoiditis.

• Intravenous (IV) antibiotics. Treatment almost always begins in the hospital with antibiotics given directly into a vein. This delivers strong, fast-acting medication and is the standard first approach, even for milder cases. Commonly used IV antibiotics include ceftriaxone and related cephalosporins. Additional antibiotics may be added when the infection is severe, when a resistant germ is suspected or when complications are present.

• Cultures. Whenever possible, a sample of fluid or pus from the ear is collected before or during treatment. Testing this sample identifies the exact germ and shows which antibiotics will work best, allowing treatment to be fine-tuned.

• Switching to oral antibiotics. Once there is clear improvement and culture results are available, treatment is usually switched from IV to antibiotics taken by mouth. Amoxicillin-clavulanate is a frequent choice. Oral antibiotics are often continued for about one to two weeks after discharge in uncomplicated cases.

• Longer courses. When the infection has spread beyond the mastoid, such as into the space around the brain, antibiotics are typically continued for about four weeks or longer.

• Ear drops. When certain germs are involved and there is drainage through the eardrum or an ear tube, antibiotic ear drops may be added.

Many uncomplicated cases improve with antibiotics alone, but close monitoring is essential. If there is no improvement within about 48 hours, a procedure or surgery is usually the next step.

Myringotomy and Ear Tube (Tympanostomy Tube) Placement

Myringotomy is a small surgical opening made in the eardrum to release infected fluid from the middle ear and relieve pressure. A sample of the fluid can be sent for culture at the same time. Often a small ear tube (tympanostomy tube, sometimes called a grommet) is placed in the opening to keep it open, allowing continued drainage and ventilation while the infection clears. This is one of the most common procedures for mastoiditis and is frequently done together with antibiotics. It is a minor procedure, and the eardrum usually heals after the tube eventually falls out on its own. See ear tube recovery.

Drainage of a Subperiosteal Abscess

A subperiosteal abscess is the most common complication of acute mastoiditis. It is a collection of pus that forms under the tissue covering the mastoid bone, causing a tender, swollen, sometimes red bulge behind the ear that may push the ear outward. Treatment options include:

• Needle aspiration, in which the pus is withdrawn through a needle.

• Incision and drainage, in which a small cut is made to drain the abscess.

These are often combined with placement of an ear tube. Many abscesses are successfully managed this way without more extensive surgery. If an abscess is large or does not resolve with these measures, a mastoidectomy may be considered.

Mastoidectomy

Mastoidectomy is a more involved operation in which the mastoid bone is opened and infected air cells and tissue are removed. It is generally reserved for specific situations rather than used as a first step:

• Infection that does not improve despite antibiotics and simpler procedures.

• Significant breakdown of the bony structure within the mastoid (coalescent mastoiditis).

• Serious complications, especially those involving the space around the brain.

• Chronic mastoiditis, particularly when associated with a cholesteatoma (an abnormal skin growth in the ear) or persistent infection that has not responded to other treatments.

The operation is performed through an incision behind the ear. Risks, though uncommon, include injury to the facial nerve (which controls movement of the face; see facial weakness), hearing loss and dizziness. An experienced ear surgeon takes careful steps to avoid these.

Chronic Mastoiditis

Chronic mastoiditis refers to a long-standing or repeatedly returning infection of the mastoid. It is often linked to ongoing ear disease, a long-term eardrum perforation or a cholesteatoma. Treatment may combine antibiotics (oral, IV or drops) with surgery. When a cholesteatoma or persistent infected tissue is present, mastoidectomy is often needed to remove the diseased tissue, stop recurring infections and protect nearby structures. See cholesteatoma treatments and ear drum perforation treatments.

Management of Complications

Although uncommon, mastoiditis can spread beyond the mastoid bone. These situations are more serious and need prompt, often more aggressive treatment, usually involving a team of specialists.

• Subperiosteal abscess. The most frequent complication, managed with drainage as described above.

• Sigmoid sinus (lateral sinus) thrombosis. A blood clot in a large vein near the mastoid that drains the brain. Treatment includes antibiotics, often surgery, and in many cases blood-thinning medication (anticoagulation).

• Intracranial complications. These include infections or abscesses in or around the brain and inflammation of the lining of the brain (meningitis). Management combines prolonged IV antibiotics, surgery on the mastoid, and involvement of a neurosurgeon when drainage of an abscess or relief of pressure is needed.

• Facial nerve weakness and inner ear involvement. Infection affecting the facial nerve or inner ear requires urgent attention to relieve pressure and preserve function.

Complicated cases often require care in a specialized or intensive care unit, longer antibiotic courses and sometimes more than one procedure.

Hospital Stay

Length of hospital stay depends on severity. Uncomplicated cases often involve a relatively short stay of a few days, once there is clear improvement and a switch to oral antibiotics is possible. Complicated cases, such as those with an intracranial complication or a blood clot, typically require a considerably longer stay, often a week or more, and sometimes time in intensive care.

Recovery and Follow-Up

• Most people recover fully. The great majority of mastoiditis cases resolve completely with appropriate treatment, and the need for repeat surgery is low.

• Completing antibiotics. Finishing the full prescribed course of antibiotics is important, even after symptoms improve.

• Follow-up visits. Follow-up with the ENT specialist confirms the infection has cleared, checks hearing and monitors any ear tube or surgical site.

• Hearing. Hearing often returns to normal as the infection resolves. In some cases, especially with complications or chronic disease, some hearing loss can persist, and hearing is monitored over time.

• Ongoing drainage. Ear drainage after treatment can occur and is reported to the care team, as it may need additional care.

• When urgent care is needed. Return of fever, worsening pain or swelling behind the ear, severe headache, drowsiness, vomiting, facial weakness, dizziness or neck stiffness are reasons for immediate medical attention, as these can signal a complication.