Clearly he has a significant problem.
I would agree that the sciatic nerve is not involved but we need to consider involvement of the L3 and L4 nerve roots.
He needs a good physical exam +/- a MRI scan depending upon the findings.
Please get back to me if you need to.
The symptoms in his legs suggest that he may have a prolapsed intravertebral disc ( a slipped disc).
Hence the need for an exam - a MRI would confirm this as well as the severity of the problem.It would also indicate if the problem were causing pressure on his spinal cord ( cauda equina syndrome).
He may not need a MRI - you can argue that unless there are significant clinical findings it is OK to wait and see ( most slipped discs get better within 6 weeks ).
Nope he needs to be up on his feet as much as possible.
Heat is not a bad idea in addition to ibuprofen and acetaminophen.
This would b be in addition to seeing his own MD.
PS - yes your payment came through - thank-you