The causes of knee numbness are mainly caused by local blood circulation disorder of knee joint, lumbar intervertebral disc herniation, tumor disease and other diseases.
1. Obstructed local blood circulation in the knee joint: Generally, the soft tissues around the knee joint have poor blood circulation in the lower limbs due to the decrease of environmental temperature or the poor warmth of the lower limbs in cold weather, and even the obstruction of local blood circulation, which leads to numbness in the knee joint.
2. Lumbar disc herniation: it is usually aggravated after bending and working, because the protruding nucleus pulposus compresses the nerve root, causing lumbago, lower limb pain, and numbness of the knee. Most patients have a history of recurrent low back pain episodes accompanied by radiating pain in the lower limbs.
3. Tumor disease: it may be caused by tumor disease in the knee area, such as bone tumor, soft tissue tumor, which may compress the nerves in the knee area and cause numbness and discomfort.
There are many causes of numbness in the knee, and it may also be diabetes complications and arterial embolism, etc. It is recommended to consult a doctor in time, to clarify the cause of the disease under the guidance of the doctor, and to carry out targeted treatment in time, so as to avoid delaying the condition.