Squatting up arm numbness and leg numbness may be caused by central diseases, or it may be caused by peripheral nerve diseases, coronary heart disease and other reasons. 1. Central diseases: cerebral ischemia can lead to sensory and motor abnormalities in the innervated area, resulting in numbness of the limbs. If the symptoms persist, it is necessary to be alert to stroke. If the symptoms are short-lived or accompanied by transient consciousness disorder, it is necessary to be alert to transient ischemic attack. 2. Peripheral nerve disease: squatting down and then getting up belongs to postural changes, when peripheral nerve compression, the above symptoms may also occur, such as cervical spondylosis combined with lumbar disc herniation, which can lead to spinal nerve root or spinal cord nerve compression, resulting in numbness in the innervated area. 3. Coronary heart disease: it can be seen in patients with cardiac insufficiency, due to squatting, blood pooling in the lower limbs, after standing up due to poor cardiac systole and diastole, resulting in the blood can not be discharged into the body circulation in a timely manner, resulting in transient ischemia of the body circulation, and numbness symptoms. The symptoms of numbness in the arms and legs after squatting sometimes cannot be accurately determined, but also need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, and it is recommended that the patient consult a doctor in time to clarify the cause of the disease.