They are a enervating problem
Frequent headaches can be a debilitating problem, detracting significantly from quality of life. The medical community breaks headaches into a system of categories, with primary headaches accounting for the vast majority of headaches.
Cluster and secondary headaches are far rarer, but can present the patient with severe pain and more serious neurological issues. Although never life threatening, primary headaches can nonetheless be very serious, infringing on quality of life in many cases. Frequent headaches, even milder primary headaches, can have a serious effect on enjoyment of daily life.