Im going to school to be a Chiropractor. Yes, there are quacks, but most sciatica cases (not all) are due to the nerve touching the spine for 1 of a few possible reasons.
Go get 4 or 5 straight(all in one week) drop table adjustments on the lower back, combined with some nice movement&a successful Gonstead style adjustment(ask for it). If either side can get good movement (even the non-painful side) it should really alleviate alot of that sharp pain..possibly the 1st time, but you need more than 1 time. Getting movement on both sides is ideal tho. (Temember, ask for Gonstead technique in sciatica treatment).
Once those are done, make sure to have your leg lengths evened out(legs are usually uneven with sciatica symptoms)&ask to see if either hip is rotated. If so have them gently put back in place via stretch or gentle pull.
Now, in some cases the Atlas in the C-spine (neck) can be the sole reason for sciatica symptoms! So be sure to ask to have that checked out&also adjusted if need be. Remember that!
Add stim, &you can add heat/ice at home&be sure to stretch on your own to keep it from returning. That may help for a while. Once you feel better get monthly or so tune-ups to re-train the muscles. But it also may depend on what the real issue is.
Massage&keeping the muscles calm helps get better adjustments &if you have someone to massage the area after adjustment ask them to do so. Enjoy (;
In most cases this will fix the actual issue at least for a while until you repeat what caused it in 1st place.
Another way to simply ease the symptom until you can get it worked on, is ask your Primary Care Physician for up to 3 'Lidocaine trigger point injection(s)' in the specific area of pain. That will ease the symptoms until you can get it actually worked on.
Watch your form when lifting! Use ur core&keep ur posture in check
Good luck&FEEL BETTER GUYS!!