Spinal intermittent stenosis is characterized by asymptomatic walking at the beginning and weakness in one or both lower limbs after a certain distance (about 1-5 minutes), which improves after rest. It is seen in spinal artery endocarditis, spinal cord developmental abnormalities, spinal stenosis, etc. 1, intermittent claudication: intermittent claudication refers to the patient from the beginning of walking, or after walking a distance (usually about a few hundred meters), unilateral or bilateral lumbago, lower limb numbness and weakness, and even claudication, but a little squatting or sitting down after a few moments of rest, the symptoms can quickly alleviate or disappear, the patient can still continue to walk, and then walk for a period of time, the above symptoms reappear. Because in this process, the limp is intermittent, so it is called intermittent claudication. 2.Heel walking: metatarsal fractures are mainly characterized by swelling of the back of the foot, impaired weight bearing on the toe and walking with the heel. 3, lower limb dragging gait: lower limb dragging gait is a clinical manifestation of corticospinal tract lesions in gait abnormalities. 4, unstable gait: unstable gait refers to the patient’s unstable walking, or see inflexible movements, walking with both legs widely separated; or walking can not walk in a straight line, left and right; or walking with a short stride, the two upper limbs do not swing back and forth, the initial walk slowly, and then more and more quickly, panic gait.