The first written records discussing cluster headaches were in the mid-1600s. At that time, the headaches were described by the intensity of the pain or given the name of the author describing them. Wilfred Harris, a British neurologist, was among the first to accurately describe the episodic nature of the headaches. Later, in 1939, Dr. Bayard Taylor Horton, a US neurologist, further described the characteristics of the severe headaches. For a while, they were known as Horton’s cephalalgia. By 1952, researchers fully understood the nature of cluster headaches and gave them the name still in use