Shingles
Shingles is a viral infection that causes a painful rash, typically appearing as blisters on one side of the body. It is caused by the varicella-zoster virus, the same virus that causes chickenpox. Shingles can occur in anyone who has had chickenpox, usually characterized by an outbreak related to stress or a weakened immune system.
Infectious Diseases- What causes shingles to develop after having chickenpox?MedlinePlusMay 2026
After you have chickenpox, the varicella-zoster virus stays dormant in your body's nerve cells. Years or decades later, the virus can reactivate and cause shingles, especially as your immune system weakens with age.
- Can I get shingles if I never had chickenpox?MedlinePlusMay 2026
No, you cannot get shingles if you've never had chickenpox, since shingles is caused by the reactivation of the chickenpox virus that stays in your body after infection.
- Why am I more likely to get shingles as I age?MedlinePlusMay 2026
As you age, your immune system naturally becomes weaker and less able to keep the dormant chickenpox virus under control, making it more likely to reactivate and cause shingles.
- How does my immune system affect whether or not I'll get shingles?MedlinePlusMay 2026
A strong immune system keeps the dormant chickenpox virus inactive, but if your immune system is weakened by age, illness, or certain conditions, the virus is more likely to reactivate and cause shingles.
- Is there anything I can do to prevent getting shingles?MedlinePlusMay 2026
Yes, there is a shingles vaccine available that can help prevent the infection or reduce its severity. Talk to your doctor about whether the vaccine is right for you, especially if you're over 50.