Edema and leg numbness are mostly seen in poor circulation in the lower limbs, thrombophlebitis, lumbar spine disease and so on. 1. Poor circulation in the lower limbs: it may be that squatting for a long time leads to long-term compression of the lower limbs, causing poor blood circulation, often feeling numbness in the legs, and sometimes it may cause swelling of the legs. 2. Thrombophlebitis: it may be caused by the damage of blood vessel wall or varicose veins, there is thrombus formation in the lumen of the vein, often accompanied by inflammatory reaction of the wall, which will show swelling and pain in the lower limbs, and sometimes numbness may also occur. 3. Lumbar spine disease: mostly seen in lumbar spinal stenosis or lumbar disc herniation, often affecting the nerves of the lower limbs, thus causing numbness of the legs, which can be accompanied by leg swelling. Edema leg numbness may also be caused by other reasons, if excluded is caused by squatting, should be timely to the hospital to identify the cause of a clear diagnosis and standardized treatment in accordance with medical advice.