Shingles is a common condition covered for free by the NHS Pharmacy First service. It's crucial to have a basic understanding of shingles to seek proper treatment. Shingles is caused by the same virus that leads to chickenpox. However, it only affects those who have had chickenpox before. While shingles cannot be passed from person to person, those with shingles can still transmit chickenpox to those who have not been vaccinated or had the virus. It's important to be cautious, especially around vulnerable individuals. Shingles presents as a line of blisters on the chest or face.