Hearing Loss: Causes, Symptoms, Diagnosis and Treatment
Hearing loss affects more than 1.5 billion people worldwide, making it one of the most common chronic health conditions. It can develop gradually over many years or occur suddenly due to infection, injury, medications, or problems affecting the inner ear.
Although hearing loss becomes more common with age, it is not an inevitable part of aging. Early diagnosis and treatment can improve communication, quality of life, and reduce the risk of social isolation and cognitive decline.
This guide explains the different types of hearing loss, their causes, symptoms, diagnosis, treatment options, and strategies to protect your hearing.
What Is Hearing Loss?
Hearing loss is a partial or complete reduction in the ability to hear sounds in one or both ears.
It may affect:
- Low-pitched sounds
- High-pitched sounds
- Speech clarity
- One ear
- Both ears
The condition may be:
- Temporary
- Permanent
- Mild
- Moderate
- Severe
- Profound
Signs and Symptoms
Many people do not realize they have hearing loss because it often develops gradually.
Common symptoms include:
- Frequently asking others to repeat themselves
- Difficulty understanding conversations
- Trouble hearing in noisy environments
- Turning up the television volume
- People seem to mumble
- Difficulty hearing children’s or women’s voices
- Ringing in the ears (tinnitus)
- Needing subtitles while watching television
- Avoiding social situations
- Fatigue after conversations
Children may show:
- Delayed speech development
- Poor school performance
- Not responding to their name
- Frequently increasing the television volume
Types of Hearing Loss
Conductive Hearing Loss
Conductive hearing loss occurs when sound cannot travel normally through the outer or middle ear.
Common causes include:
- Earwax blockage
- Ear infections
- Fluid behind the eardrum
- Perforated eardrum
- Otosclerosis
- Foreign objects
Many cases are temporary and treatable.
Sensorineural Hearing Loss
This is the most common type of permanent hearing loss.
It results from damage to:
- The cochlea
- Inner ear hair cells
- Auditory nerve
Common causes include:
- Aging
- Loud noise exposure
- Certain medications
- Viral infections
- Genetic conditions
- Ménière’s disease
Mixed Hearing Loss
Mixed hearing loss is a combination of conductive and sensorineural hearing loss.
What Causes Hearing Loss?
Age-Related Hearing Loss (Presbycusis)
Hearing gradually declines with age because of natural damage to the inner ear.
Symptoms usually begin with difficulty hearing:
- High-pitched sounds
- Conversations in noisy places
Noise-Induced Hearing Loss
Repeated exposure to loud sounds damages the delicate hair cells of the cochlea.
Common sources include:
- Concerts
- Firearms
- Loud music
- Power tools
- Factories
- Construction equipment
Unlike many other cells, damaged hair cells do not regenerate.
Earwax (Cerumen) Buildup
Earwax (cerumen) is a natural substance produced by glands in the ear canal. It helps protect the ear by trapping dust, dirt, bacteria, and other foreign particles while also lubricating the skin of the ear canal.
Normally, earwax gradually moves out of the ear on its own. However, excessive earwax or impacted earwax can block the ear canal and interfere with the transmission of sound, leading to temporary conductive hearing loss.
Symptoms of earwax buildup may include:
- Reduced hearing
- A feeling of fullness or blockage in the ear
- Ringing in the ears (tinnitus)
- Ear discomfort or pain
- Itching
- Dizziness
- A sensation that the ear is “plugged”
People who wear hearing aids, regularly use earbuds or earplugs, have narrow ear canals, or frequently use cotton swabs are more likely to develop impacted earwax.
How Is Earwax Removed?
If earwax is causing symptoms, it can usually be removed safely by a healthcare professional using one or more of the following methods:
- Earwax-softening drops (such as carbamide peroxide or olive oil-based products)
- Gentle ear irrigation (when appropriate)
- Microsuction
- Removal with specialized instruments under direct visualization
Do not insert cotton swabs, hairpins, or other objects into your ear canal, as they often push wax deeper, increase the risk of impaction, and may injure the ear canal or eardrum.
Once the blockage is removed, hearing usually returns to normal immediately unless another underlying hearing problem is present.
Ear Infections
Middle ear infections commonly cause temporary hearing loss, especially in children.
Ménière’s Disease
This inner ear disorder causes:
- Fluctuating hearing loss
- Vertigo
- Ear pressure
- Tinnitus
Sudden Sensorineural Hearing Loss
Sudden hearing loss develops rapidly, usually over hours or within three days.
It is considered a medical emergency and requires immediate evaluation by an ear, nose, and throat (ENT) specialist. Prompt treatment—often with corticosteroids—offers the best chance of hearing recovery.
Symptoms include:
- Sudden hearing loss in one ear
- Ringing in the ear
- Ear fullness
- Dizziness
Genetic Causes
Some people inherit hearing loss that appears during childhood or adulthood.
Head Injury
Trauma can damage:
- The eardrum
- Middle ear bones
- Inner ear
- Auditory nerve
Chronic Diseases
Several medical conditions increase the risk of hearing loss, including:
- Diabetes
- High blood pressure
- Autoimmune diseases
- Chronic kidney disease
Hearing Loss as a Medication Side Effect
Some medications can damage the inner ear (ototoxicity) or affect hearing temporarily.
Aminoglycoside Antibiotics
Examples include:
- Gentamicin
- Tobramycin
- Amikacin
These medications may damage the cochlea, particularly when used at high doses or for prolonged periods.
Chemotherapy Drugs
Examples include:
- Cisplatin
- Carboplatin
These medications can cause permanent hearing loss in some patients.
Loop Diuretics
Examples include:
- Furosemide
- Bumetanide
Usually associated with high intravenous doses.
High-Dose Aspirin
Large doses may temporarily cause:
- Hearing loss
- Ringing in the ears
Symptoms generally resolve after the medication is stopped or the dose is reduced.
NSAIDs
Occasionally associated with temporary hearing changes:
- Ibuprofen
- Naproxen
- Diclofenac
Quinine
Quinine-containing medications may affect hearing and cause tinnitus.
Never stop taking a prescribed medication without consulting your healthcare provider.
Risk Factors
Your risk increases if you:
- Are over 60 years old
- Regularly work in noisy environments
- Listen to loud music through headphones
- Smoke
- Have diabetes
- Have cardiovascular disease
- Take ototoxic medications
- Have a family history of hearing loss
When Should You See a Doctor?
Seek medical attention if you:
- Notice gradual hearing loss
- Have ringing in the ears
- Experience dizziness
- Develop ear pain
- Have ear discharge
- Have difficulty following conversations
Seek emergency medical care immediately if you experience sudden hearing loss, especially in one ear, with or without ringing or dizziness.
How Is Hearing Loss Diagnosed?
Your healthcare provider may recommend:
- Medical history
- Medication review
- Ear examination (otoscopy)
- Tuning fork tests (Weber and Rinne tests)
Additional tests may include:
- Pure-tone audiometry (audiogram): Measures the quietest sounds you can hear at different frequencies and determines the degree and type of hearing loss.
- Speech audiometry: Assesses how well you hear and understand spoken words.
- Tympanometry: Evaluates middle ear function and detects fluid, eardrum perforation, or Eustachian tube dysfunction.
- Otoacoustic emissions (OAE): Commonly used in newborns and children to assess cochlear (outer hair cell) function.
- Auditory brainstem response (ABR): Measures how the hearing nerve and brainstem respond to sound and is useful when neurological problems are suspected.
- CT or MRI scans (selected cases)
Degrees of Hearing Loss
Hearing loss is usually classified according to the quietest sound a person can hear (measured in decibels hearing level [dB HL]):
| Degree | Hearing Threshold |
|---|---|
| Normal | 0–20 dB |
| Mild | 21–40 dB |
| Moderate | 41–55 dB |
| Moderately Severe | 56–70 dB |
| Severe | 71–90 dB |
| Profound | Over 90 dB |
How Is Hearing Loss Treated?
Treatment depends on the underlying cause.
Possible options include:
- Earwax removal
- Antibiotics (when indicated)
- Treating middle ear infections
- Hearing aids
- Cochlear implants
- Bone-conduction hearing devices (for selected patients)
- Surgery for otosclerosis or chronic ear disease
- Speech and hearing rehabilitation
Hearing Aids
Modern digital hearing aids amplify sounds while reducing background noise.
They may significantly improve:
- Communication
- Social interaction
- Quality of life
- Tinnitus in some people
Cochlear Implants
People with severe or profound sensorineural hearing loss who receive little benefit from hearing aids may be candidates for a cochlear implant.
Unlike hearing aids, cochlear implants bypass damaged hair cells and directly stimulate the auditory nerve.
Can Hearing Loss Be Prevented?
Many cases can be prevented by:
- Wearing hearing protection in noisy environments
- Limiting headphone volume (the 60/60 rule: no more than 60% volume for no longer than 60 minutes at a time)
- Treating ear infections promptly
- Avoiding unnecessary exposure to ototoxic medications
- Managing chronic conditions such as diabetes and high blood pressure
- Not inserting cotton swabs or other objects into the ear canal
Supplements That May Help
Magnesium
Some studies suggest magnesium may help protect against noise-induced hearing damage, but evidence is not strong enough to recommend routine supplementation for hearing loss.
Vitamin B12
Vitamin B12 deficiency has been associated with hearing problems in some individuals. Supplementation may help when a deficiency is confirmed.
Folate
Low folate levels have been linked to age-related hearing decline in some studies, but evidence remains limited.
Omega-3 Fatty Acids
A diet rich in omega-3 fatty acids may support cardiovascular health, which is important for maintaining blood flow to the inner ear. However, evidence for preventing hearing loss is mixed.
Antioxidants
Research is ongoing into antioxidants such as vitamins C and E for protecting the inner ear from noise damage, but routine supplementation is not currently recommended.
Amazon Recommendations
Hearing Protection
Ear Care
Supplements
Hearing Loss in Children
Hearing loss can affect children of any age, from newborns to teenagers. It may be present at birth (congenital hearing loss) or develop later because of infections, ear problems, loud noise exposure, injuries, or certain medical conditions. Early diagnosis and treatment are important because hearing plays a vital role in speech, language, learning, and social development.
Temporary hearing loss in children is often caused by middle ear infections (otitis media) or fluid behind the eardrum (otitis media with effusion or “glue ear”). Permanent hearing loss is less common but requires prompt evaluation and appropriate management.
Signs and Symptoms
The signs of hearing loss vary depending on a child’s age.
Infants may:
- Not startle at loud sounds.
- Not turn toward familiar voices by around 6 months of age.
- Not babble or make age-appropriate sounds.
- Seem unaware of voices or environmental sounds.
Older children may:
- Frequently ask people to repeat themselves.
- Turn up the television or tablet volume.
- Speak more loudly than usual.
- Have difficulty following conversations, especially in noisy places.
- Seem inattentive or not respond when called.
- Experience delays in speech or language development.
- Perform poorly at school because they cannot hear instructions clearly.
Common Causes
Hearing loss in children may be caused by:
- Middle ear infections (otitis media)
- Fluid behind the eardrum (glue ear)
- Earwax blockage
- Congenital hearing loss
- Viral or bacterial infections
- Head injuries
- Exposure to very loud noises
- Certain medications that can damage hearing (ototoxic medications)
- Genetic conditions
Treatment
Treatment depends on the underlying cause.
For example:
- Earwax blockage can often be safely removed by a healthcare professional.
- Ear infections may require observation, pain relief, or antibiotics, depending on the cause and severity.
- Glue ear often improves on its own, but persistent cases may require referral to an ear, nose, and throat (ENT) specialist.
- Permanent hearing loss may be managed with hearing aids, cochlear implants, speech and language therapy, and educational support.
Early treatment gives children the best opportunity to develop normal speech, language, and communication skills.
When Should You See a Doctor?
Seek medical advice if your child:
- Does not respond to sounds or voices.
- Has delayed speech or language development.
- Frequently asks people to repeat themselves.
- Has recurrent ear infections.
- Complains of hearing loss, ear pain, or ringing in the ears.
- Suddenly develops hearing loss in one or both ears.
Sudden hearing loss should always be treated as a medical emergency, as early treatment may improve the chances of recovery.
💡 Pharmacist’s Tip
Many cases of hearing loss in children are temporary and are caused by ear infections or fluid behind the eardrum. However, because hearing is essential for speech and learning, any suspected hearing loss should be assessed promptly. Newborn hearing screening and regular hearing checks during childhood help identify problems early, allowing treatment to begin as soon as possible.
Can hearing loss be reversed?
Conductive hearing loss caused by earwax, infections, or fluid may often be reversed. Most sensorineural hearing loss is permanent, but hearing aids or cochlear implants can improve hearing.
Does tinnitus always mean hearing loss?
No. However, tinnitus frequently occurs alongside hearing loss, particularly age-related and noise-induced hearing loss.
Can headphones damage hearing?
Yes. Listening to loud music for prolonged periods can permanently damage the inner ear.
Can medications cause hearing loss?
Yes. Aminoglycoside antibiotics, cisplatin, loop diuretics, high-dose aspirin, and some NSAIDs are among the medications associated with hearing loss.
What is the difference between hearing aids and cochlear implants?
Hearing aids amplify sound, while cochlear implants bypass damaged parts of the inner ear and directly stimulate the auditory nerve.
Can ear infections cause hearing loss in children?
Yes. Ear infections and fluid behind the eardrum are among the most common causes of temporary hearing loss in children. Hearing usually returns to normal once the infection or fluid clears, but repeated or persistent ear infections should be evaluated by a healthcare professional because they can affect speech and language development if left untreated.
Clinical Considerations
Age-related hearing loss and noise-induced hearing loss account for most cases of permanent hearing impairment. Because untreated hearing loss has been associated with reduced quality of life, depression, and cognitive decline, early recognition and treatment are important. Sudden sensorineural hearing loss is an otologic emergency, and prompt treatment—ideally within 72 hours—offers the best chance of hearing recovery.
Related Guides
- Why Do I Have Ringing in My Ears or Ear Pressure?
- Why Is My Nose Always Blocked?
- Why Have I Lost My Sense of Smell?
- Why Have I Lost My Sense of Taste?
- Vitamin B12 Deficiency: Symptoms, Causes and Treatment
- Magnesium: Benefits, Dosage and Side Effects
References
- World Health Organization (WHO). World Report on Hearing.
- National Institute on Deafness and Other Communication Disorders (NIDCD). Age-Related Hearing Loss.
- American Academy of Otolaryngology–Head and Neck Surgery. Clinical Practice Guideline: Sudden Hearing Loss.
- American Speech-Language-Hearing Association (ASHA). Types of Hearing Loss.
- Mayo Clinic. Hearing Loss: Symptoms and Causes.
- UpToDate. Evaluation of Hearing Loss in Adults.
