Clinical Reasoning: A Teenager With Right-Sided Headache and Periorbital Changes.

While migraine is the most common headache disorder in children and adolescents presenting to a neurologist, other primary headache disorders are important to recognize. Trigeminal autonomic cephalalgias represent a rare group of primary headache disorders with different characteristics, workup and management. Here, we present an adolescent with one common and one unique headache phenotype followed by a guided discussion of the differential diagnoses, workup, treatments and a brief summary of further management considerations.