The results of the present study support the central model for CTH which posits that stress contributes to headache by agrivating existing hyperalgesia in CTH suffers.
Cathcart, S., Bhullar, N., Immink, M., Della Vedova, C., & Hayball, J. (2012). Pain sensitivity mediates the relationship between stress and headache intensity in chronic tension-type headache. Pain Research and Management, 17(6), 377-380. https://doi.org/10.1155/2012/132830