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1.The pain in the left lower side of the abdomen and back which is
radiation to the leg and also numbness - this suggest the possible cause could be spine or hip joint pathology.
2.In cease of degenerative
disc disease when the disc herniated and cause the pressure effect on the nerve or spinal chord such
radiating pain with numbness is seen.
3.Also in the hip joint space reduction with
nerve irritation may cause the similar symptoms.
4.I would suggest to get a MRI
lumbar spine which will delineate the cause.
5.X-ray hip joint to rule out the inflammatory and joint space reduction can be assessed.
6.Suggest to get an appointment and get needful investigations and treatment accordingly.
Good luck.
Hope i have answered your query,
any thing to ask do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888