Explain Science

Shingles

Shingles, or herpes zoster, is a viral infection that manifests as a painful skin rash. It is caused by the varicella-zoster virus, which is the same virus responsible for chickenpox. After an episode of chickenpox, the virus remains dormant in the nerve cells near the spinal cord and brain. However, it can reactivate years later, typically due to age-related decline in immune function or other factors that compromise the body’s defenses.

The reactivation of the varicella-zoster virus leads to the development of shingles. The initial symptoms may include pain, tingling, or itchiness in a specific area of the body. Within a few days, a rash appears, usually on one side of the body or face, following the path of the affected nerve. The rash typically consists of small blisters that eventually crust over and heal.

Aside from the rash, individuals with shingles may experience flu-like symptoms, such as fever, headache, and fatigue. The pain associated with shingles can be severe and debilitating, sometimes persisting even after the rash has disappeared. This persistent pain is known as postherpetic neuralgia and can last for months or years.

While anyone who has had chickenpox can develop shingles, the risk increases with age and in individuals with weakened immune systems. Vaccination against shingles is available and recommended for adults over the age of 50 to prevent or reduce the severity of the condition.

If you suspect you have shingles, it is important to consult a healthcare professional for diagnosis and appropriate treatment. Antiviral medications can help alleviate symptoms, speed up recovery, and reduce the risk of complications. Pain management strategies may also be implemented to provide relief during the infection and afterward, if postherpetic neuralgia occurs.