A muscle knot, also known as a myofascial trigger point or adhesion, is a small area within a muscle that becomes shortened and inflamed. It can cause significant pain, stiffness, and limited mobility in nearby joints. Massaging a muscle knot can be uncomfortable, with sensations including sharp or stabbing pain, dull ache, and restricted movement. Identifying causes such as overuse, poor posture, trauma, and stress, and taking preventive measures like exercise, proper technique, and maintenance routines can help minimize risk of developing muscle knots.