Myotonia is a condition characterized by prolonged muscle stiffness or difficulty relaxing muscles after contraction. This occurs due to abnormal electrical activity in the muscle fibers, which can lead to symptoms such as muscle cramps and delayed relaxation. Myotonia can be a feature of various genetic disorders, including myotonic dystrophy and congenital myotonia. The severity and specific symptoms of myotonia can vary widely among individuals. Diagnosis typically involves a physical examination, patient history, and sometimes specialized tests like electromyography (EMG). Treatment options may include medications, physical therapy, and lifestyle adjustments to help manage symptoms and improve muscle function.