If you have been dealing with persistent back or neck pain that seems to flare up with certain movements, facet joint syndrome may be the underlying cause. The facet joints are small, paired joints located along the back of the spine that provide stability and guide movement between vertebrae. When these joints become inflamed, worn down, or irritated, they can produce localized pain, stiffness, and discomfort that radiates into nearby areas such as the buttocks, groin, shoulders, or upper arms. Many people mistake this pain for a general muscle problem, so understanding the true source matters when seeking effective care.