Laugh more often. One study showed that social laughter actually increases pain tolerance.5 Laughing along with others was shown to have the highest positive impact. Laughter has many positive effects, including increasing circulation and oxygen, and raising your body's level of endorphins (the body's natural pain killers). There is a whole movement called "laughter yoga"—which helps people enjoy the many benefits of laughter without having to need a reason to laugh—it just focuses on laughing for its own sake.
7) The indoleamine 2,3-dioxygenase pathway controls complement-dependent enhancement of chemo-radiation therapy against murine glioblastoma. Li M, Bolduc AR, Hoda MN, Gamble DN, Dolisca SB, Bolduc AK, Hoang K, Ashley C, McCall D, Rojiani AM, Maria BL, Rixe O, MacDonald TJ, Heeger PS, Mellor AL, Munn DH, Johnson TS. J Immunother Cancer. 2014 Jul 7; PMID: 25054064
Schematic showing another inflammatory pathway that is activated by tissue injury. This is the NF-kB activation, in which once the protein is free as a result of tissue injury, it can enter the cell nucleus and activate the DNA to enhance the inflammatory response further by the production of additional cytokines, chemokines, and adhesion molecules (IKKB = IkB kinase)