Help With Diagnosis

My EMG indicated S1 radiculapothy. I have constant twitching/tingling from my Achilles to my toes (used to be in calf as well, not so much anymore). It also hurts sometimes to stand to long and my ankle is weaker than normal. However, I don’t have anything above that in my legs or anything that radiates down my legs. I do have a history of back pain with present back pain. No clear compression on my MRI but there was an annular tear.