A guitar truss rod is a metallic rod that runs by the neck of a guitar. It’s used to regulate the curvature of the neck, which might have an effect on the playability and intonation of the guitar. When the truss rod is tightened, it pulls the neck ahead, inflicting it to bow outward. When the truss rod is loosened, it releases the strain on the neck, inflicting it to bow inward.
Adjusting the truss rod is a comparatively easy course of, however it is very important do it appropriately to keep away from damaging the guitar. If you’re not comfy making this adjustment your self, you may take your guitar to a professional guitar technician.