Sciatica is the term used for any pain felt down the sciatic nerve. The sciatic nerve originates from your lumber spine (L4, L5 and S1) and runs down your lower back, buttocks, hamstrings and lower leg.
Irritation or pinching of this nerve can cause severe symptoms such as pain, tingling, weakness and numbness anywhere along its entire length down the posterior chain.
It is very important to seek professional advice in these situations as long-term nerve compression can permanently damage the nerve and its function. In these cases your symptoms may become permanent.