The difficulty of the calf while sleeping may be related to the following reasons: 1. There may be lesions related to the calf muscles, such as the patient due to cold or excessive fatigue and other reasons, causing muscle spasm in the calf area. If the patient walks too long a distance or carries too much weight, it may cause muscle fatigue in the calf area, and the above-mentioned conditions may cause discomfort in the calf when the patient sleeps. 2, it may be caused by peripheral neuropathy, such as lumbar disc herniation, sciatica attacks, may produce radioactive pain, numbness, weakness and other uncomfortable symptoms in the calf, and such symptoms may increase at night. 3.It may be caused by osteoporosis, for example, older patients with osteoporosis may feel obvious bony pain in the calves, thighs, hips, etc., and accompanied by very obvious symptoms of weakness during sleep. 4.It may be caused by old injuries, for example, patients with old fractures in the calves or serious soft tissue blunt contusions in the past, during During sleep, the symptoms of soreness will be produced here due to slowed blood circulation or still sterile inflammation.