Yes, SPS (Stiff Person Syndrome) is painful.
Stiff Person Syndrome is a rare neurological disorder characterized by muscle rigidity and spasms. According to information from the reference, the muscle spasms associated with SPS are extremely painful and can be triggered by stress or other external factors. These spasms can generate enough force to even break bones. The rigidity in muscles can also cause discomfort, as muscles can feel like a board.
Therefore, based on the reference, pain is a significant symptom of SPS.
