Getting your annual flu shot is one of the best ways to protect yourself and those around you from influenza. While it’s a quick and simple process, it’s common to experience some mild side effects afterwards. The most frequent one is soreness in the arm where the vaccine was administered. But how long should you expect that discomfort to last? In this blog, we’ll explore common flu shot side effects and their duration.
Looking for a same-day flu shot in Union City, NJ? Come visit the walk-in clinic at AFC Urgent Care Union City. We’re open 7 days a week so you and your family can stay protected all season long. Walk in or plan your visit in advance below!
Why Does Arm Soreness Happen After a Flu Shot?
When the flu vaccine is injected into your muscle, your immune system immediately recognizes the virus particles (which are inactive or weakened) as foreign. This triggers an immune response, which is exactly what helps your body build protection against the flu. The redness, swelling, or soreness you feel in your arm is part of that immune response– it’s a sign that your body is working to create antibodies.
How Long Does The Soreness Last?
For most people, arm pain from the flu shot is mild and temporary. Discomfort usually begins within a few hours of the shot and lasts one to three days. In some cases, especially for those with stronger immune responses, soreness can linger for up to five days, but this is less common.
If your arm remains painful beyond a week, or if you notice severe swelling, warmth, or spreading redness, it’s a good idea to contact a healthcare provider to rule out infection or other complications.
Tips For Relieving Arm Pain After a Flu Shot
You don’t have to simply wait out the soreness, there are steps you can take to ease discomfort:
- Use your arm: Gentle movement and light exercise can help distribute the vaccine and reduce stiffness
- Apply a cool compress: Icing the injection site can reduce swelling and pain
- Take over-the-counter pain relievers: Medications like ibuprofen or acetaminophen may help, but only if recommended by your healthcare provider
- Stay hydrated: Fluids support your immune system as it responds to the vaccine
While mild soreness is normal, you should seek medical attention if you notice intense pain that worsens instead of improving, significant swelling or redness spreading around the injection site, and fever or body aches that last longer than a few days.
Get a Walk-In Flu Shot at AFC Urgent Care Union City in Union City, NJ
Most people experience only minor arm soreness after a flu shot, and it usually goes away within a few days. Though it may feel uncomfortable, the temporary pain is a small trade-off for the lasting protection the vaccine provides against influenza. If soreness persists or worsens, don’t hesitate to reach out to your healthcare provider. Do you need your annual flu shot? Come visit the walk-in clinic at AFC Urgent Care Union City! Our urgent care center is conveniently located at 4200 Bergenline Avenue in Union City, NJ, and we offer immediate and preventive services with no appointment necessary– just walk-in! If you have any additional questions about flu shots, or other services we provide, please contact us directly at (551) 257-1948.
