A sudden impact from a car crash or a bad fall can lead to a neck sprain. If you have any of these symptoms mentioned by the American Academy of Orthopaedic Surgeons, you should visit your doctor:
• Neck pain, particularly pain at the back of the neck that worsens when you move.
• Pain in the neck that becomes worse about a day after an injury.
• Pain and muscle spasms in the upper area of the shoulder.
• A headache that affects the back of the head.
• A sore throat, feeling tired and irritable, or having trouble sleeping and concentrating.
• Numb sensation in the hand or arm, or a tingling sensation or weak feeling affecting the arms.
• Limited range of motion or stiffness in the neck.
Source - The Daily Star

