When you get adjusted by a chiropractor the chiropractor does adjustments to your body by applying thrusts of varying speed and forces to the spinal joints that are causing dysfunction and related pain.
The chiropractor will use their hands or a small instrument to apply a controlled, sudden force to a spinal joint and after doing that the pain gets relieved in that area.
Licensed Chiropractors are trained very well in doing the adjustments and having a chiropractor adjustment can really help to relieve pain.