calf spasms

1. Introduction A sudden charley horse in the calf while sleeping is primarily caused by an involuntary, sustained spasm of the gastrocnemius or soleus muscles. This nocturnal cramping frequently results from a combination of muscle fatigue, localized cellular dehydration, and electrolyte imbalances that lower the firing threshold of peripheral motor nerves. When these nerves become … Read more

1. Introduction Getting severe leg cramps in your calves exactly as you fall asleep is a common, though intensely painful, neuromuscular event clinically recognized as nocturnal leg cramps. These sudden, agonizing spasms are typically related to daily muscle fatigue, specific sleeping postures, or subtle metabolic shifts that inadvertently lower the firing threshold of motor neurons … Read more