Headache is one of the most common types of recurrent pain as well as one of the most frequent symptoms in neurology. In addition to occasional headaches, there are well-defined headache disorders that vary in incidence, prevalence and duration and can be divided into two broad categories. In secondary headache disorders, headaches are attributed to another condition, such as brain tumour or head injury; for the primary disorders the headache is not due to another condition.

Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve.

HP:0001354

HP:0000266

Headache

Headaches

human_phenotype

HP:0002315

http://purl.obolibrary.org/obo/hp.owl

https://www.ncbi.nlm.nih.gov/books/NBK2605/

https://www.epilepsy.com/learn/about-epilepsy-basics/what-happens-during-seizure

http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Headache