Single most likely diagnosis
- Cerumen impaction or earwax buildup: This is often the most common cause of itchy ears due to the irritation and blockage caused by excess earwax.
Other Likely diagnoses
- Ear canal dermatitis (eczema): An inflammatory condition of the skin in the ear canal, which can cause itching, redness, and sometimes discharge.
- Otitis externa (swimmer's ear): An infection of the outer ear and ear canal, often caused by bacteria or fungi, leading to itching, pain, and discharge.
- Allergic reactions: Allergies to ear drops, jewelry, or other substances can cause an itchy ear.
Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Malignant otitis externa: A severe infection that can spread to the skull base and is more common in diabetic or immunocompromised patients.
- Necrotizing otitis externa: A rare but serious infection that can cause significant tissue damage and is often seen in patients with compromised immune systems.
Rare diagnoses
- Psoriasis or other skin conditions: Though less common, psoriasis and other skin conditions can affect the ear canal and cause itching.
- Keratosis obturans: A rare condition where a plug of desquamated skin accumulates in the ear canal, potentially causing itching and hearing loss.
- Relapsing polychondritis: A rare autoimmune disorder that can affect the cartilage of the ear, leading to itching, pain, and other symptoms.