Cerumen impaction: This is the most common cause of white nodules or masses visible in the ear canal. Cerumen, or earwax, can sometimes accumulate and be visible as white or yellowish nodules, especially if it has been pushed deeper into the canal or has built up over time.

Seborrheic keratosis: These are benign growths that can appear as white or light-colored nodules and can occur around the ear, including the opening of the ear canal.
Eczema or dermatitis: Inflammatory conditions of the skin can cause white, scaly patches or nodules around the ear canal due to the buildup of dead skin cells and other debris.
Fungal infections: Certain fungal infections, like those caused by Candida, can lead to white patches or nodules in and around the ear canal, especially in individuals prone to such infections.

Basal cell carcinoma or squamous cell carcinoma: Although less common, skin cancers can present as white or flesh-colored nodules around the ear. Given the potential severity of these conditions, they should not be overlooked.
Malignant otitis externa: This is a severe infection of the ear canal that can present with white discharge or nodules, especially in diabetic or immunocompromised patients. It requires prompt medical attention.

Cholesteatoma: A type of skin cyst that can occur in the ear canal, potentially visible as a white nodule. Cholesteatomas are rare and usually associated with chronic ear infections or trauma.
Osteoma: A benign bone tumor that can very rarely occur in the ear canal, presenting as a hard, white nodule.
Milia: Small, white bumps that can appear when dead skin cells or keratin, a protein, gets trapped under the skin surface. They are more common on the face but can occasionally be found around the ear canal.