What is it?
Involuntary neck-muscle contractions cause abnormal head posture or repeated movements; this is a movement disorder.
Symptoms and important signs
Head turning or tilting, tremor and sometimes pain.
How is it assessed?
Neurological examination; further tests when another cause is suspected.
Care and treatment options
Specialist treatment may include targeted botulinum toxin and suitable rehabilitation.
When to seek help
Sudden neck stiffness with fever or new neurological loss needs urgent assessment.