We know that pain is complex. It involves multiple cell types, receptors, and signaling molecules. There’s neuropathic (nerve) pain and nociceptive (tissue) pain. There are the central and peripheral nervous systems; the NaV, K+, TRPV, and acid-sensing ion channels; modulators that adjust the behavior of those channels; the P2X7 receptors; and much more.
Thankfully, you can find all the tools you need to study pain, right here.