Sleeping with nowhere to put your legs can be caused by overwork, lumbar spine disease, osteoporosis, restless leg syndrome and other reasons. 1. Overwork: overworked legs during the day, slow metabolism during sleep, resulting in the accumulation of lactic acid in the legs, which can cause leg soreness and swelling, and the feeling that the legs are nowhere to be found. 2. Lumbar spine disease: lumbar spine disease such as lumbar disc herniation can compress the nerve root and cause pain, numbness, weakness and other uncomfortable symptoms in the lower limbs, and improper posture during sleep can aggravate the nerve compression and cause discomfort in the legs. 3. Osteoporosis: Calcium deficiency due to osteoporosis can cause twitching and spasms in the muscles of the lower limbs, which can lead to discomfort in the legs and a feeling of having no place to rest at night while sleeping. 4. Restless Legs Syndrome: Restless Legs Syndrome can cause indescribable discomfort in both lower limbs at rest, which often worsens at night when resting, and the discomfort in the legs is so severe that it feels like there is no place to put them. When you feel uncomfortable and have no place to put your legs when you sleep, you should consult a doctor in time, and under the guidance of a specialist, you should actively carry out appropriate treatment, which will help to alleviate the pain and discomfort symptoms as soon as possible.