Like conventional medicine, chiropractic is based upon scientific principles of diagnosis through testing and empirical observations. Treatment is based upon the practitioner's rigorous training and clinical experience. Unlike conventional medicine, which focuses on attempting to treat disease once it occurs, chiropractic attempts to improve the health of the individual in an effort to avoid illness in the first place. Most people would rather be healthy and avoid illness, if they could. This is one of the main reasons for the big upsurge in the popularity of chiropractic. People are recognizing the benefit of seeking an alternative to traditional medicine; one that will help them achieve and maintain optimal health.