Hello my friend I am Dr. Arianisa Thanks for your question on HCM Shingles is a viral infection that causes a painful rash. Shingles is caused by the varicella-zoster virus — the same virus that causes chickenpox. After the patient had chickenpox, the virus lies inactive in nerve tissue near your spinal cord and brain. Years later, the virus may reactivate as shingles. While it isn t a life-threatening condition, shingles can be very painful. Vaccines can help reduce the risk of shingles, while early treatment can help shorten a shingles infection and lessen the chance of complications. There s no cure for shingles, but prompt treatment with prescription antiviral drugs can speed healing and reduce your risk of complications. These medications include antivirals and painkillers to reduce the pain.Taking a cool bath or using cool, wet compresses on his blisters may help relieve the itching and pain. And, if possible, try to reduce the amount of stress in his life. Shingles generally lasts between two and six weeks. Most people get shingles only once, but it is possible to get it two or more times.Stay always in contact with your doctor Hope he gets better soon Best regards