Lumbar intervertebral disc herniation do bed for a while the soles of the feet red and purple clinically belong to the manifestation of cyanosis, the soles of the feet cyanosis and lumbar intervertebral disc herniation itself does not have too much correlation, may be due to diabetes mellitus, vascular diseases of the lower limbs, but also due to the trauma causes. 1. Diabetes mellitus: diabetes mellitus can cause diabetic foot due to abnormal glucose metabolism of the body, resulting in decreased blood flow in the blood vessels of the lower limbs, thickening of the capillary basement membrane, brittle and other pathological changes, resulting in ischemia and hypoxia of the soles of the feet, which manifests itself as the symptoms of cyanosis of the soles of the feet. 2. Lower limb vascular disease: when the venous return of lower limb is blocked for various reasons, it will lead to the stagnation of lower limb veins in the blood vessel which can’t complete the normal gas exchange and tissue metabolism, and the symptom of cyanosis of the soles of the feet may also appear, such as varicose veins of the lower limb, thrombotic occlusive vasculitis and so on. 3. Trauma: foot trauma will appear tissue edema and capillary rupture and other pathological changes, may also appear the symptoms of cyanosis of the soles of the feet, such as foot smashing, foot crush injury. Lumbar disc herniation sitting in bed for a while the soles of the feet red and purple, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.