80% of the population will suffer from back pain or neck pain throughout their life. Most of these people would benefit from chiropractic care.
Anyone with osteoporosis, (thinning of bones), should avoid a chiropractor. Since a chiropractor works with manipulating the spine, any person who has osteoporosis requires other attention compared to care a chiropractor can provide.
If you are unsure if you can/should see a chiropractor, simply consult with a chiropractor. Chiropractors are the best professionals to talk to if you want to know whether your condition can benefit from chiropractic care.