Mayo Clinic Health Manager
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By Mayo Clinic staffVagus nerve stimulation is considered generally safe. But it does pose the risk of numerous problems, some serious. You may have risks both from the surgery to implant the device and from the brain stimulation.
Surgery risks
Surgical complications may include:
- Incision pain
- Infection
- Damage to the vagus nerve
- Breathing problems
- Nausea
- Heart problems
- Incision scarring
Side effects after surgery
Side effects and adverse health problems associated with vagus nerve stimulation include, but may not be limited to:
- Voice changes
- Hoarseness
- Cough
- Neck pain
- Chest pain
- Breathing problems, especially during exercise
- Difficulty swallowing
- Tingling or prickling of the skin
- Sore throat
- Pulse generator malfunction or movement, which may require additional surgery
- Worsening of depression
- Suicidal thoughts or behavior
These side effects may continue as long as you use vagus nerve stimulation, which could be years. However, the electrical impulses can be adjusted to help minimize these effects. If side effects are intolerable, the device can be shut off temporarily or permanently.