Uncomfortable legs just want to make hard to straighten the consideration is due to muscle strain, lumbar disc herniation, restless leg syndrome and other reasons. 1. Muscle strain: If you walk too much, stand for a long time, overwork, etc., it will cause muscle strain in the legs, and at the same time, lactic acid secretion increases, which will cause uncomfortable legs just want to straighten. 2. Lumbar disc herniation: If the patient has lumbar disc herniation, when the protruding disc causes compression to the nerve root, it will cause pain and discomfort from the buttocks through the back of the thighs, calves, feet and other parts of the pain and discomfort, and also cause uncomfortable legs just want to straighten up. 3. Restless Legs Syndrome: It is a sensory-motor disorder that mainly involves the nervous system of the legs, and patients will experience indescribable discomfort in the legs, which will lead to a strong desire to move the legs, and the symptoms are usually aggravated at night when they are resting. It can be seen that the cause of discomfort in the legs just want to vigorously straighten the cause of more, if the symptoms are more serious, extreme discomfort, you can go to the hospital to further identify the cause of the disease, and then targeted treatment.