Shingles is a disease that is caused by the re-emergence of the chicken pox virus, herpes zoster. It has a different presentation from chicken pox because shingles is emerging from the inside of your nerves rather than an external exposure. It is possible to get shingles more than once.
The pain of shingles has been compared to passing a kidney stone or childbirth, and lasts a few weeks. Some people with shingles will develop a complication called post-herpetic neuralgia, which is characterized by nerve pain that can last for months to years.
The shingles vaccine, Shingrix, is indicated for anyone 50 years of age or over. It is over 90% effective in preventing this disease. Two doses are required, spaced 2-6 months apart.