It's impossible to predict. If you have had chronic headaches for many years, improvement can take time. Headaches may be common, but they're certainly not normal. Every headache has a cause. If chiropractors are unable to find and correct the cause of your headaches, they can refer to other specialists who may be able to help.
Chiropractors work with bones of the spinal column and nerves of the spinal cord.
Chiropractors spend years of highly specialized training in order to locate where misplaced spinal vertebrae are impinging the nerves which travel down the spinal cord and out through the spinal column to the muscles, organs and glands of the body. Chiropractic doctors locate areas of the spine that aren't moving properly. They notice spinal curves. They look at your posture and your ability to turn and bend. These and many other examinations can help determine if you are likely to benefit from chiropractic care.