Is It Normal To Feel Sick After a Flu Shot?

September 21, 2023

As flu season approaches, many people rush to get their annual flu vaccine to protect themselves and those around them from the seasonal influenza virus. While the flu vaccine is generally safe and effective, some individuals may experience mild side effects. Feeling sick after a flu shot is not uncommon, but it’s important to understand which symptoms are normal and when it might be necessary to seek medical attention.

For a same-day, walk-in flu shot, visit the walk-in clinic at AFC Urgent Care Ken Caryl. We provide flu shots to all patients in the Littleton, CO area on a walk-in basis. Simply stop by today or check-in online so you can stay flu-free this season.

Understanding the Flu Vaccine

Before outlining the side effects, it’s important to understand how the vaccine works. Flu shots contain inactive or weakened forms of the influenza virus. When you receive a flu shot, your immune system is exposed to these components, which prompts it to produce antibodies. These antibodies can recognize and fight off the real influenza virus if you are exposed to it later in the season. Each year, strains of the influenza virus can mutate and change, making it crucial to receive a flu shot every year to best protect yourself and those around you from illness.

Common SIde Effects After a Flu Shot

It’s important to note that most people who receive the flu shot will experience little to no side effects. However, some individuals may develop mild reactions which typically subside after a few days. These side effects should be short-lived. They are simply a sign that your body is responding to the vaccine, which is exactly what it’s meant to do!

  • Common side effects after a flu shot may include:
  • Sore arm at injection site
  • Low-grade fever
  • Fatigue
  • Muscle aches
  • Headache
  • Nausea

When To Seek Medical Attention

While most post-flu shot symptoms are mild and resolve within a day or two, there are certain situations that may cause some concern. Uncommon but serious allergic reactions to flu vaccines can occur. If you experience any of the following symptoms within minutes to hours after receiving your flu shot, seek immediate medical help. Remember, the flu shot is the single most effective way to prevent illness from the flu. If you have a history of adverse reactions to the flu vaccine, work with your healthcare provider to plan additional flu prevention measures– especially if you’re a vulnerable individual at high-risk for flu-related complications.

  • Difficulty breathing
  • Hives
  • Swelling of the face or throat
  • Fast heartbeat
  • Dizziness or weakness

Get Your Walk-In Flu Shot at AFC Urgent Care Ken Caryl

Feeling sick after a flu shot is not unusual, and mild side effects are typically just a sign that your body is building protection against the virus. If you do experience severe or unusual symptoms, seek immediate care. However, for the average person, the overall benefits of getting vaccinated far outweigh the risk of experiencing rare, adverse reactions. If you have further concerns or questions about the flu shot, call us directly at (720) 818-8010 to speak with a healthcare provider. Our team can give you personalIed guidance based on your medical history and individual health status. Walk-in today for your annual flu shot!

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