Sleepy legs should be alert to cold stimulation, excessive exercise, lumbar disc herniation, osteoporosis and other causes, if the symptoms persist, it is recommended that timely medical treatment. 1. Cold stimulation: If the legs are stimulated by cold and thin clothing, it is easy to cause leg sleepiness, and the symptoms can be relieved after keeping warm. 2. Excessive exercise: If the patient is engaged in intense sports, it is easy to cause the accumulation of lactic acid in the legs, and the metabolism of lactic acid will also appear in the process of lower limb weakness and other manifestations. 3. Herniated lumbar discs: when a herniated lumbar disc compresses the nerves, it is easy to cause pain and numbness in the lower limbs, and usually there is sleepiness in the legs. 4. Osteoporosis: mild osteoporosis does not have obvious symptoms, when osteoporosis is more serious, it is easy to cause sleepy legs. The causes of sleepy legs are many, and may also be related to lower limb thrombosis, old injury, rheumatoid arthritis, etc. It is recommended to go to the hospital in time to find out the cause of the disease by the doctor, and carry out targeted treatment.