sexual headache orgasmic headache A type of headache that occurs during, directly before, or directly after orgasm; or is otherwise related to, orgasm. The International Classification of Headache Disorders (ICHD) used to divide such headaches into preorgasmic headache and orgasmic headache. However, these subforms were merged into one entity with varying presentation because clinical studies could not distinguish them. orgasmic cephalalgia orgasmic cephalgia orgasmic headaches post-orgasmic headache preorgasmic headache