A pain or ache in the head. / (figuratively) A nuisance or unpleasant problem.

plural of headache

Obsolete form of headache.

Having a tendency to cause a headache.

Alternative spelling of ice cream headache

(pathology) An extremely painful, cyclical and unilateral headache.

plural of cluster headache

Migraine.

plural of suicide headache

(informal) cluster headache