Acute Otitis Externa: This condition, also known as swimmer's ear, is an infection of the outer ear canal. It is a common cause of inflammation of the superficial auricular lymph nodes due to its proximity and the body's natural response to infection.

Cellulitis of the Face or Scalp: Infections of the skin of the face or scalp can lead to inflammation of the superficial auricular lymph nodes as the body responds to the infection.
Furuncle or Carbuncle of the Ear: A boil (furuncle) or a group of boils (carbuncle) on the ear can cause inflammation of the nearby lymph nodes.
Impetigo: A highly contagious skin infection that can cause lymphadenopathy, including of the superficial auricular nodes, especially if the infection is located on the face or ear.

Malignancy (e.g., Squamous Cell Carcinoma): Although less common, malignancies of the ear or surrounding areas can cause lymphadenopathy. Missing such a diagnosis could have severe consequences.
Lymphoma: While rare, lymphoma can present with lymphadenopathy, including in the superficial auricular nodes, and is critical not to miss due to its significant implications for treatment and prognosis.
Cat-Scratch Disease: Caused by Bartonella henselae, this disease can lead to lymphadenopathy, including in the superficial auricular nodes, if the scratch is near the ear.

Actinomycosis: A rare bacterial infection that can cause abscesses and lymphadenopathy, including in the head and neck region.
Tuberculosis: Although more commonly associated with deeper lymph nodes, tuberculosis can rarely cause inflammation of superficial lymph nodes, including those in the auricular region.
Sarcoidosis: A condition that can cause inflammation in various parts of the body, including the lymph nodes, though it is less commonly associated with the superficial auricular nodes.