Cerumen impaction or eczema: Chronic itchiness in the ears can often be attributed to the buildup of earwax (cerumen) or eczema (atopic dermatitis) affecting the ear canal. Both conditions are common and can cause persistent itching.

Allergic contact dermatitis: This condition occurs when the skin in the ear canal reacts to an allergen, such as certain metals in earrings or ingredients in hair products, leading to itchiness and inflammation.
Psoriasis: Psoriasis can affect the ears, leading to itchy, scaly patches.
Seborrheic dermatitis: This condition can cause a red, itchy, and flaky rash on various parts of the body, including the ears.
Ear canal dermatitis: Inflammation of the ear canal skin, which can be caused by various factors including allergies, irritants, or infections, leading to itchiness.

Basal cell carcinoma or squamous cell carcinoma: Although rare, skin cancers can present with itching and should not be missed due to their potential severity.
Middle ear infections or mastoiditis: Infections in the middle ear or mastoid bone can cause itching, among other symptoms like pain and fever, and require prompt treatment to prevent complications.

Keratosis obturans: A condition where a plug of keratin forms in the ear canal, potentially causing itching and hearing loss.
Relapsing polychondritis: A rare autoimmune disorder that can affect the cartilage in the ears, among other areas, leading to inflammation, pain, and potentially itching.
Necrobiotic xanthogranuloma: A rare skin condition that can cause lesions and itching in various parts of the body, including the ears.