The reasons for sleeping with crunchy legs at night include both physiological (e.g. improper posture) and pathologic conditions, with the latter being commonly caused by lumbar disc herniation, spinal stenosis, and so on. Treatment includes physical, drug and surgical treatment. 1. Physiological causes: If sleeping at night due to poor posture, resulting in pressure on the legs, resulting in blood circulation disorders, thus causing the legs tingling, can be relieved by changing the sleeping posture, no treatment is needed. 2. Pathological causes (1) Herniated lumbar intervertebral disc: numbness of the lower limbs is one of the most common first symptoms of this disease. Mild symptoms can be treated conservatively, such as bed rest, wearing a brace, limiting spinal flexion and extension activities, and at the same time can be given medication such as indomethacin, etc.; or massage, acupuncture and other treatments; if necessary, surgery can be taken. (2) Lumbar spinal stenosis: lumbar spinal stenosis can also cause the symptoms of sleeping with the legs crunchy, non-surgical treatments should be used first, such as traction, bed rest, massage, physical therapy, and at the same time, with nutritive drugs, such as methylcobalamin, ghrelin and so on. If necessary, surgery is feasible. In addition to the above reasons, cervical spondylosis and advanced diabetes can also cause the above symptoms, and relevant treatment should be given according to the condition. If the above symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner to identify the cause and give targeted treatment. The above medications should be used under the guidance of a doctor or pharmacist, avoid self-medication.