Uncomfortable legs can be caused by restless leg syndrome, varicose veins, lumbar disc herniation and other reasons, the specific reasons need to go to the hospital to determine the examination. 1. Restless Legs Syndrome: Restless Legs Syndrome is mostly caused by abnormal dopamine function in the brain, malnutrition, heredity, decreased immunity, etc. The main symptoms are discomfort in the lower limbs, the desire to move the legs, and periodic limb movement disorder. 2. Varicose veins: Varicose veins are mostly caused by venous reflux, venous reflux disorder, prolonged standing, congenital developmental abnormality, etc. The main symptoms are purple vein protrusion, soreness and tenderness in the legs. 3. Lumbar disc herniation: Lumbar disc herniation is mostly caused by injury, heredity, disc degeneration, etc. Patients will experience numbness of the lower limbs and decrease in muscle strength of the lower limbs, which will make their legs uncomfortable. If the situation of how to put the leg is uncomfortable, should promptly go to the hospital for medical treatment, after diagnosis, follow the doctor’s instructions for treatment.