Ramsay Hunt syndrome happens when the same virus that causes chickenpox reactivates inside a nerve cluster near your ear. You don’t “catch” it from someone else. Instead, the virus has been living dormant in your body since your original chickenpox infection, potentially for decades, and something triggers it to wake up and attack the facial nerve. Most cases occur in people age 60 and older, though it can affect anyone who has had chickenpox.
The Virus Behind It
The varicella-zoster virus causes chickenpox during the initial infection, usually in childhood. Your immune system fights off the active infection, but it never fully eliminates the virus. Instead, varicella-zoster retreats into nerve cells and goes quiet. It can stay there for the rest of your life without causing problems.
In Ramsay Hunt syndrome, the virus reactivates in a specific spot: a tiny nerve cluster called the geniculate ganglion, which sits inside the bone behind your ear. This ganglion is part of the facial nerve, the nerve responsible for controlling the muscles on one side of your face. When the virus flares up here, it causes inflammation and swelling that damages the nerve, leading to the syndrome’s hallmark symptoms: facial paralysis on one side, a painful blistering rash in or around the ear, and often hearing problems or ringing in the affected ear.
The virus can also spread to neighboring nerves. The nerve responsible for hearing and balance is affected most frequently, which is why dizziness, vertigo, and hearing loss are common. Less often, nerves controlling sensation in the face, eye movement, or swallowing can be involved.
Why the Virus Reactivates
The short answer is that your immune system loses its grip on the virus. When your body’s defenses weaken, even temporarily, the dormant virus can exploit that window and begin multiplying again. The main risk factor is a weakened immune response, which can happen for several reasons:
- Aging. Immune function naturally declines as you get older, which is why the vast majority of cases occur after age 60.
- Immunosuppressive conditions. HIV infection and other conditions that directly impair your immune system significantly raise the risk. People who are immunocompromised also tend to experience more severe symptoms.
- Medical treatments. Chemotherapy, organ transplant medications, long-term steroid use, and other therapies that suppress immune activity can create an opening for the virus.
- Chronic illness. Lung disease, kidney disease, and other long-term health conditions may increase the likelihood of reactivation.
Being female and experiencing physical injury (particularly in people over 65) are also associated with a higher risk of shingles-related reactivation in general. Stress and illness are widely cited as triggers, though pinpointing exactly what sets off any individual case is difficult. The virus can reactivate at various points and progress at different speeds, meaning some people develop facial paralysis early while others see it appear later as the inflammation builds.
How It Differs From Regular Shingles
Ramsay Hunt syndrome is essentially shingles in a very specific, high-stakes location. When varicella-zoster reactivates along a nerve in your torso or limbs, it produces the classic shingles rash: a painful band of blisters on one side of the body. When it reactivates in the geniculate ganglion near the ear, the consequences are more serious because the facial nerve controls so many critical functions, from closing your eye to moving your mouth.
The facial paralysis in Ramsay Hunt syndrome tends to be more severe than in Bell’s palsy, which is the more common form of sudden facial paralysis. Recovery rates are also lower. While the blistering rash usually appears in or around the ear canal, on the earlobe, or on the roof of the mouth, some people develop facial weakness before any rash shows up, which can make early diagnosis tricky.
Can You Spread It to Others?
Ramsay Hunt syndrome itself is not contagious. You can’t give someone facial paralysis or the syndrome directly. However, the active blisters contain live varicella-zoster virus, which means you can transmit the virus to someone who has never had chickenpox and has not been vaccinated against it. That person would develop chickenpox, not Ramsay Hunt syndrome. Once the blisters have crusted over, the risk of spreading the virus drops substantially. Until then, avoiding contact with newborns, pregnant women who haven’t had chickenpox, and immunocompromised individuals is important.
Who Is Most at Risk
Anyone who has ever had chickenpox carries the dormant virus and could theoretically develop Ramsay Hunt syndrome. In practice, the condition is uncommon and overwhelmingly affects older adults whose immune systems have weakened with age. People on immune-suppressing medications or living with conditions like HIV face a disproportionately higher risk.
Children who received the chickenpox vaccine rather than getting the natural infection carry a much lower viral load in their nerve cells, which likely reduces their future risk of any varicella-zoster reactivation. The shingles vaccine, recommended for adults 50 and older, works by boosting the immune system’s ability to keep the dormant virus suppressed. It is the most direct way to lower your chances of developing Ramsay Hunt syndrome.