If the sciatic nerve is damaged, it could result in numbness, tingling and, in more severe cases, weakness in the knees or legs. The longer it is left untreated, the longer it will take for numbness and weakness to go away, and they may become permanent.

How long does leg weakness last after sciatica?

An acute episode may last between one and two weeks and usually resolves itself in a few weeks. It's fairly common to experience some numbness for a while after the pain has subsided. You may also have sciatic episodes a handful of times a year.

Can sciatica leave you with a weak leg?

While your sciatica pain can be severe and cause your leg to feel weak, the symptoms typically do not produce any long-term complications.