The doctor said I had herpes zoster. Is it a precursor to skin cancer? Say thank you if you know.

It's not herpes zoster, it's a viral infection, and it's a common skin disease. Sometimes we should pay attention to neuralgia, also known as snake gall sore.

Consequences: in most cases, the rash of herpes zoster will get better within 2~4 weeks, and most herpes zoster can be cured without complications. People with decreased immunity may be more serious and last longer. After herpes zoster is cured, people can gain more lasting immunity, so they generally don't relapse.

Herpes zoster is rarely life-threatening, and the mortality rate of patients over 70 years old is about 1‰. If the newborn is exposed to varicella-zoster virus at birth, and there is no mother's antibody protection, the virus infection may be fatal.