Welcome at HCM.
I have read complete details of your question.
It looks from your details that you are having pain at your outer aspect of leg.This pain looks to be pricking or pinching in nature.This type of pain is generally due to abnormality of nerves.There are some reasons for this ,which are following-
-Deficiency of vitamin B1
-Endocrine disorders like thyroid problem & others.
-Compression of nerves in your back or in course of nerve.
-Disc problem in back .
If you are also suffering from back pain
then most probable reason looking at your age can be lumber spondylosis
or compression by disc.In that case you should avoid lifting heavy weight & abnormal position at your back.
You should also start some exercises which are mentioned in following link-
At present from relief from pain you may take a good nerve analgesic
on prescription from your doctor.
Nerve analgesic include tramadol,pregabalin
or gabapentin(This is for your information only).
Hope this all will help you.
With best wishes.