Chronic daily headache.

Chronic daily headache (CDH) is a challenging condition to treat. CDH is often accompanied by significant comorbidities, such as chronic fatigue, depression, anxiety, and insomnia, which further complicate treatment. Unrealistic expectations of treatment goals can lead to patient frustration, and, as a result, decrease treatment adherence. Patients often desire headache-free status, but this outcome is not realistic for many patients with CDH. By contrast, an effective treatment goal starts with establishing the correct diagnosis and creating a multimodal treatment plan to improve function and well-being. With proper comprehensive treatment, the condition improves in most patients.