If you tie a string around your finger and the tip becomes purple from a lack of circulation, would you cut off the purple part of your finger? Or would you simply untie the string?
When you have pain and/or symptoms, your body is telling you that there is problem—aaaaannnd that it has been there for a while. Sciatica, migraines, headaches, numbness, tingling, plantar fasciitis, neck pain and back pain are all symptoms of an interruption to communication between the nervous system and the rest of the body.
If you get into a horrible car accident and one of your arms is hanging by a tendon, you wouldn’t ask for a chiropractic adjustment.
Likewise, if you are suffering from one of the aforementioned symptoms, there is a very high probability that treating those symptoms with prescription drugs or surgery will leave you with even more symptoms than you began with. I say this from personal experience.
I can tell you with supreme confidence that going to a chiropractor, though, will leave you with far fewer symptoms than you began with.