The Global Isaac Mertens Syndrome Market Size is Expected to Grow from USD 345.28 Million in 2024 to USD 573.31 Million by 2035, at a CAGR 4.72% during the forecast period 2025 To 2035.Isaac Mertens Syndrome is a rare neurological disorder characterized by continuous muscle stiffness, twitching, and cramps caused by nerve hyperexcitability. It leads to muscle weakness, pain, and impaired movement.