Shingles, or herpes zoster, is a viral infection that leads to a painful rash. It is caused by the varicella-zoster virus, the same virus responsible for chickenpox. After someone recovers from chickenpox, the virus stays inactive in the body but can reactivate later, causing shingles.
The main symptom of shingles is a painful rash, often appearing as a single band or cluster of blisters on one side of the body, typically on the torso or face. This rash may be accompanied by itching, tingling, or a burning sensation. Additional symptoms can include fever, headache, fatigue, and light sensitivity.
The shingles rash typically follows a pattern called a dermatome, which corresponds to the area served by a specific nerve. The rash usually lasts two to four weeks, with blisters eventually crusting over and healing. In some instances, pain can persist even after the rash heals, a condition known as post-herpetic neuralgia.
Shingles is more common among older adults and those with weakened immune systems. A vaccine is available to prevent shingles, recommended for individuals 50 and older. Early treatment with antiviral medications can reduce the severity and duration of symptoms, so it’s important to seek medical care quickly if shingles is suspected.