is an episodic headache
to start with, but it can become continous after some years if not properly treated. Also, there is possibility of combination headaches
(migraine and tension headaches), which give the impression of a continuos headache. Consult a psychiatrist
for detailed evaluation as there are many medicines available nowadays to prevent migraine headaches. Lifestyle modifications like regular eating and sleep habits, avoiding caffeine/chocolates etc and minimising stress are also important part of treatment.