4α-PDD	4α-phorbol-12,13-didecanoate
5-HT	serotonin
BBA	bisandrographolide A
CAMKII	calmodulin-dependent kinase II
CGRP	calcitonin gene-related peptide
COPD	chronic obstructive pulmonary disease
CSD	cortical spreading depression
DRG	dorsal root ganglion
GABA	gamma-aminobutyric acid
GWAS	genome-wide association studies
IASP	International Association for the Study of Pain
IL-10	interleukin 10
KYNA	kynurenic acid
NGF	nerve-growth factor
NI	neurogenic inflammation
NMDA	N-methyl-D-aspartate receptor
NO	nitrogen oxide
NSAIDs	nonsteroidal anti-inflammatory drugs
NTG	nitroglycerin
MOH	medication overuse headache
PACAP	pituitary adenylate cyclase-activating peptide
PAG	periaqueductal gray matter
PAR2	protease-activated receptor 2
PGs	prostaglandins
PKC	protein kinases C
PKA	protein kinases A
PNS	peripheral nervous system
ROS	reactive oxygen species
RTX	resiniferatoxin
SP	substance P
TG	trigeminal ganglion
TNF	tumor necrosis factor
TRP	transient receptor potential
TRPV1	transient receptor potential vanilloid-1 receptor
TRPV4	transient receptor potential vanilloid-4 receptor
TRPM8	transient receptor potential melastatin 8
TRPA1	transient receptor potential ankyrin 1
VG	vagal ganglia