Hi, I'm 33 and I've been diagnosed with herpes zoster. I had unprotected passive sex 3 weeks ago with a man who might have syphilis. Are the 2 related?

No. Herpes zoster (shingles) is caused by the varicella-zoster virus — the same virus that causes chickenpox. After you've had chickenpox, the virus lies inactive in nerve tissue near your spinal cord and brain. Years later, the virus may reactivate as shingles. Syphilis is a bacterial infection usually spread by sexual contact. Shingles is a viral infection, syphilis is a bacterial infection.