You can get sciatica (needles/tingling in leg) due to
nerves of spinal cord being trapped or crushed
between collapsed or mispositioned bones in the
spinal structure (in the back).

Below is a recommendation, but consult more
people for your particular condition.

Instead of becoming horrified and thinking you
need surgery to cure it. Try doing the following:

1. Open up the hip joint by doing side to side
swings. Place the base foot on which you are
standing 90 degrees pointing at 9 am in one
case, and at 3 pm direction in the other case
(alternating the leg). This is akin to side kick
but the leg is never bent, and swung straight
side to side.

2. Do similar straight leg circular moves,
like outside crescents. Make sure the base foot
is again placed 90 degrees pointing so you
dont pull any ligament in your thigh or hip
joint.

3. Do basic karate Front, Side, Back, Crescent
kicks.

Keep neck and upper body positions correct.

This is very healthy for the back. Start slow
and try to guess the correct positions.
Do the kicking in correct body alignment,
so have a karate instructor or TKD instructor
show you if one is available.

4. Rest. Sleep off the pain for one or two days.

5. Eat manly foods: so you feel like an Armenian
uncle !