Why does my jaw feel tight and sore on the right side when waking up?
1. Introduction Tightness and soreness isolated to the right side of the jaw upon waking are typically caused by unilateral sleep bruxism, an involuntary grinding or clenching of the teeth during the night. This sustained mechanical load preferentially exhausts the right masseter and temporalis muscles, leading to localized inflammation, muscle spasms, and joint stiffness. Understanding … Read more