Injury to the laryngeal nerves is uncommon.

When it does occur, it can be from:

• A complication of neck or chest surgery (especially thyroid, lung, heart surgery, or cervical spine surgery)
• A breathing tube in the windpipe (endotracheal tube)
• A viral infection that affects the nerves
• Tumors in the neck or upper chest, such as thyroid or lung cancer
• A neurological condition
• Neck or chest trauma

Symptoms include:

• Difficulty speaking
• Difficulty swallowing
• Hoarseness

Injury to the left and right laryngeal nerves at the same time can cause a breathing problem. This can be an urgent medical problem.

Your health care provider will check to see how your vocal cords move. Abnormal movement may mean that a laryngeal nerve is injured.

Tests may include:

• Bronchoscopy
• CT scan of the chest
• Laryngoscopy
• MRI of the brain, neck, and chest
• X-ray

Treatment depends on the cause of the injury. In some cases, no treatment may be needed and the nerve may recover on its own. Voice therapy is useful in some cases.

If surgery is needed, the goal is to change the position of the paralyzed vocal cord to improve the voice. This can be done with:

• Arytenoid adduction (stitches to move the vocal cord toward the middle of the airway)
• Injections of collagen, Gelfoam, or another substance
• Thyroplasty

If both the left and right nerves are damaged, a hole may need to be cut into the windpipe (tracheotomy) right away to allow breathing. This is followed by another surgery at a later date.

The outlook depends on the cause of the injury. In some cases, the nerve rapidly returns to normal. However, sometimes the damage is permanent.

Contact your provider if you have:

• Difficulty breathing (call right away)
• Unexplained hoarseness that lasts for more than 3 weeks

Vocal cord paralysis

Dexter EU. Perioperative care of the thoracic surgical patient. In: Sellke FW, del Nido PJ, Swanson SJ, eds. Sabiston and Spencer Surgery of the Chest. 10th ed. Philadelphia, PA: Elsevier; 2024:chap 4.

Nouraei SAR, Sandhu GS. Laryngeal and esophageal trauma. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 66.

Woodson G. Pathophysiology of recurrent laryngeal nerve injury. In: Randolph GW, ed. Surgery of the Thyroid and Parathyroid Glands. 3rd ed. Philadelphia, PA: Elsevier; 2021:chap 42.

Updated by: Ashutosh Kacker, MD, FACS, Professor of Clinical Otolaryngology, Weill Cornell Medical College, and Attending Otolaryngologist, New York-Presbyterian Hospital, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.