Differential Diagnosis for Behind the Ear Dermatitis
- Single most likely diagnosis
- Contact Dermatitis: This is the most likely diagnosis due to the common occurrence of irritants or allergens behind the ear, such as earrings, hair products, or soap. The skin behind the ear is sensitive and prone to reactions.
- Other Likely diagnoses
- Seborrheic Dermatitis: This condition is common and can affect the area behind the ear, causing redness, itching, and flaking skin.
- Eczema (Atopic Dermatitis): Eczema can occur anywhere on the body, including behind the ear, and is characterized by itchy, inflamed skin.
- Psoriasis: Psoriasis can cause red, scaly patches behind the ear, especially in individuals with a history of the condition.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Malignant Otitis Externa: Although rare, this condition is a serious infection of the outer ear and canal that can spread to the skull base and cause significant morbidity or mortality if not promptly treated.
- Basal Cell Carcinoma or Squamous Cell Carcinoma: Skin cancers can present as non-healing lesions or dermatitis behind the ear, and early detection is crucial for effective treatment.
- Rare diagnoses
- Darier's Disease: A rare genetic disorder that affects the skin, causing greasy, crusted lesions that can occur behind the ear.
- Keratosis Follicularis (Phrynoderma): A rare condition characterized by follicular hyperkeratosis, which can cause rough, dry skin behind the ear.