X-rays only show bones; soft tissue injuries (which cause most accident pain) are invisible. Common invisible injuries: ① muscle strain (whiplash neck, lumbar), ② ligament sprains (cervical, lumbar, joints), ③ joint capsule injuries, ④ disc injuries (mild — full disc shows), ⑤ tendon strains. MRI detects some but not all. Korean medicine specializes in soft tissue injury treatment with acupuncture, Chuna, herbs. Don't ignore real pain because X-ray is normal — get appropriate treatment.