What does sciatica cause?

Sciatica is a patient's symptom, mainly due to a variety of reasons caused by sciatic nerve stimulation compression, produced by a radioactive pain, mainly along the sciatic nerve distribution area will show electric shock like, knife-like, or even fire-like pain, sometimes also show sour swelling and soreness, pain, sometimes also cause ants crawling these feelings. There are also patients who will show areas of nerve control, as well as swelling, fever, and even chills. They will feel that blood vessels are blocked. Over time, the nerves will be damaged, which will cause the areas of nerve control to show a decrease in pain. For example, when needles are used, they will not feel obvious pain or feel no pain. If the nerves continue to be compressed, the muscle strength controlled by the nerves will decrease or even disappear completely. That is, different degrees of paralysis symptoms.