10 Shingles Vaccine Side Effects: Why the Second Dose Feels Different and How to Feel Better Fast
From 'anamnestic' responses to arm pain, here is why you feel rough—and why it's still totally worth it
If you’re over age 50 or have a suppressed immune system, you may have heard your doctor recommend the shingles vaccine. But what is the Shingrix vaccine, exactly, and how might you feel after getting it? We spoke with health experts to gather all the information you need on the shingles vaccine and its side effects that are being talked about all over social media. Keep reading to learn more, plus get pro tips to minimize your body’s reaction to the jab.
Who should get the shingles vaccine?
Shingles is an illness that stems from the chickenpox virus lying dormant in your body. If you ever had chickenpox as a child, you are at risk of a future shingles outbreak, marked by a rash and nerve pain.
Luckily, there is a safe, effective vaccine to guard against shingles called Shingrix, also known as a recombinant zoster vaccine (RZV). It is recommended by the Centers for Disease Control and Prevention (CDC) for people over 50 to protect against the disease and its related complications. It is administered through two shots, given two to six months apart.
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Bonus: It’s even been shown to reduce dementia and cardiovascular events like heart attack, research finds.
How effective is the shingles vaccine?
Two doses of Shingrix offer around 97 percent protection, and a bit lower for people over the age of 70, according to findings published in the New England Journal of Medicine. And research also shows the benefits of the shingles vaccine can last at least seven years.
Still, some people feel torn about getting the vaccine after hearing the prospect of experiencing temporary unpleasant side effects. “The virus is already inside you,” says Ebru Karpuzoglu, PhD, an immunologist and expert in molecular medicine and Chief Scientific Director at AveSeena. “Strengthening your immune surveillance is the best way to keep it quiet. And it is always better safe than sorry.”
10 possible side effects of the singles vaccine
Adults age 50 and older are reporting various reactions to these shots. “Side effects fall into two main categories,” from local to body-wide, says Dr. Karpuzoglu. At the injection site, you might notice:
- Pain
- Tenderness
- Redness
- Swelling
- Itching
“All are normal,” Dr. Karpuzoglu says.
As for symptoms that affect the whole body: Sanjiv S. Shah, MD, infectious disease specialist and Chief Medical Officer of MetroPlusHealth, says the most common side effects of the shingles vaccine include:
- Fatigue
- Muscle pain
- Headache
- Mild fever
- Nausea
“[Side effects of the shingles vaccine] typically last two to three days,” Dr. Shah explains.
Why am I suddenly hearing more about shingles vaccine side effects?
You may be hearing about side effects more than in past years for a reason. Dr. Karpuzoglu explains, “The newer shingles vaccines tend to cause more noticeable reactions than the older live vaccine because they contain a potent adjuvant designed to activate innate immunity and build stronger long-term protection.”
Dr. Shah adds, “Overall, it’s most important to remember that these effects are temporary and signs that your immune system is building protection. That said, those experiencing extreme reactions or prolonged symptoms should speak with their doctor.”
Is the second Shingrix dose worse than the first?
Some folks posting on social media have shared they didn’t feel side effects from the initial dose, but then did with the follow-up dose. Others on Reddit are simply asking, “Second shingles shot… how bad is it?” Dr. Shah says, “There has been no evidence implying that side effects are stronger after the second dose.”
So what might be happening in those who do see a difference from shot one to shot two? “This is actually your immune system doing exactly what it should,” says Dr. Karpuzoglu. She explains, “The first dose introduces antigens from the varicella-zoster virus and starts the education process. Your body begins making antibodies and generating memory B cells and T cells that get stored for future use, meaning they will remember when they come in contact with this virus and defend you.”
Then the second dose arrives. “Those memory cells recognize the antigen right away and mount a much faster, stronger response. We call this a secondary or anamnestic response. It’s essential for fighting off infections,” she says. “So feeling rough after dose two isn’t a warning sign. It means your immune memory got established and it’s doing its job.”
How to minimize shingles vaccine side effects
“A few practical strategies help,” assures Dr. Karpuzoglu. Her advice:
- Stay hydrated before and after your shot. “This supports lymphatic function and helps your body manage the inflammatory response.”
- Get good sleep the night before. “Sleep deprivation throws off immune regulation.”
- Schedule your appointment carefully. Choose a time on your calendar “when you can rest the next day if needed.”
- Treat the injection site. “A cool compress helps.”
- Practice gentle movement afterward. Get your injection arm moving. This can ease arm soreness and stiffness. “But save the intense workouts for a couple days later.”
- Consider pain relief. Use over-the-counter pain relievers if needed, once symptoms start. “Some immunologists and physicians suggest not taking them preventively beforehand because there’s a theoretical concern about blunting the immune response, though this is still debated.”
Is the shingles vaccine worth it?
“Absolutely,” says Dr. Karpuzoglu. “Shingles isn’t just a rash. The virus reactivates from nerve tissue where it’s been sitting dormant since you had chickenpox as a kid, and it can cause serious nerve pain. Postherpetic neuralgia—a chronic nerve pain condition—sometimes lasts months or even years and really affects quality of life. If it hits the eye, your risk is vision loss. In vulnerable people, complications can be severe.”
One Reddit user posted about a case of shingles that affected her sciatic nerve and made it difficult to walk for nearly five weeks. “Compare that to the one-day discomfort of getting the vaccine. Even if the vax made me ill for a week, I’d still take that over nerve damage that lasts a month or more,” she said.
Bottom line: “While temporary side effects from the shingles vaccine may occur, the protection it provides outweighs the disease,” Dr. Shah says. And complications are more severe with older folks.
“Trading a few days of feeling tired and achy for years of protection against chronic pain seems like a straightforward decision to me,” Dr. Karpuzoglu adds.
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