Disk herniations at l4-5, could cause pressure to either the L4 or L5 nerves or both.
L4 would cause pain or numbness
along the front and inside if the shin stopping at the ankle. L5 would cause the outside of the calf and top of the foot to be affected. Weakness bringing the toes and ankle up may be present with both, but L4 could cause thigh/quads weakness. Mri
would answer definitively.