Potential side effects of the flu shot and how to deal with them

Summary: Flu vaccine side effects like soreness, mild fever, or fatigue are usually short-lived and manageable at home with rest, hydration, and over-the-counter pain relief. Most symptoms resolve within 24–48 hours, but it’s important to see a GP if they persist or worsen.

Getting the flu shot is a crucial step in protecting yourself and others from influenza. However, like all vaccines, the flu shot can cause some mild side effects. Understanding these side effects and knowing how to manage them can make the experience more comfortable. In this article, we explore the common side effects of the flu vaccine, how to treat them, and when to seek medical advice.

What are some common side effects of the flu shot?

Most flu shot side effects are mild and short-lived. The most common ones include:

• Soreness, redness, or swelling at the injection site – This is the most frequent reaction and usually subsides within a few days.
• Mild fever – Some people experience a low-grade fever for a day or two.
• Headache and muscle aches – General fatigue, body aches, and mild headaches can occur.
• Fatigue – Feeling a bit run-down for a short period after the vaccine is common.
• Mild nausea – Some individuals report mild gastrointestinal symptoms.

Severe allergic reactions to the flu shot are very rare. If you experience difficulty breathing, swelling of the face or throat, or a fast heartbeat, seek immediate medical attention.

How to treat flu vaccine side effects

Most flu shot side effects can be managed at home with simple remedies:

• Pain and swelling at the injection site – Apply a cool compress, or ice pack and keep the arm moving to reduce discomfort.
• Mild fever and aches – Stay hydrated and rest. Over-the-counter pain relievers like paracetamol or ibuprofen can help.
• Fatigue – Give your body time to recover by getting adequate rest.
• Nausea – Eating light meals and staying hydrated can ease mild nausea.

Also read: Does the Flu Shot Weaken Your Immune System? Flu Shot Myths Busted!

How long until flu shot side effects go away?

Most side effects resolve within 24 to 48 hours. Injection site soreness may last a few days but should gradually improve. If side effects persist beyond a few days or worsen, it is advisable to consult a doctor.

How to recover from a flu shot faster

To speed up recovery and reduce discomfort, consider the following tips:

• Stay hydrated – Drink plenty of fluids to help your body recover.
• Move your arm – Keeping the injection site active can prevent stiffness and soreness.
• Rest if needed – If you feel tired or have mild flu-like symptoms, listen to your body and take it easy.
• Eat nutritious foods – A balanced diet can support immune function and overall recovery.

Also read: What to Avoid After Flu Shot: Prepping and Aftercare Steps

Where can I get a flu shot in Australia?

Flu vaccines are widely available across Australia at:

• GP clinics
• Pharmacies
• Workplace vaccination programmes
• Community health centres

Many pharmacies and GP clinics offer walk-in flu vaccinations, making it easy to get immunised at a convenient time.

Why do I need a flu shot every year?

The flu virus evolves rapidly, and each year, the vaccine is updated to match the most common circulating strains. Immunity from the flu shot also wanes over time, so annual vaccination is necessary to maintain protection.

Can I get a flu shot if I’m allergic to eggs?

Traditionally, flu vaccines were produced using egg-based technology, which raised concerns for people with egg allergies. However, research has shown that most individuals with egg allergies can safely receive the flu vaccine under medical supervision. If you have a severe egg allergy, consult your GP for guidance, as there are egg-free vaccine options available.

When to contact a GP

While mild side effects are normal, you should see a GP if you experience:

• Persistent or worsening symptoms beyond 48 hours
• High fever (above 39°C)
• Severe pain, swelling, or redness at the injection site
• Signs of an allergic reaction, such as difficulty breathing or swelling of the face or throat

Can a telehealth doctor help?

Yes, telehealth consultations are a convenient way to discuss flu shot concerns, side effects, and management strategies. A telehealth doctor can provide:

• Advice on managing side effects – If you are unsure whether your symptoms are normal, a doctor can assess them virtually.
• Medical certificates – If you need time off work due to flu shot side effects, a telehealth doctor can issue a medical certificate.
• Prescriptions for symptom relief – If needed, the doctor can prescribe medications for symptom management.
• Referrals – If further evaluation is required, a telehealth doctor can refer you to a GP or specialist.

How can Hola Health’s online doctor help via telehealth?

Hola Health’s online doctor service provides convenient access to healthcare from the comfort of your home. With Hola Health, you can:

• Consult a doctor online instantly – Get medical advice on flu vaccine side effects, symptom management, and recovery.
• Receive doctor’s referrals online – If your symptoms require further assessment, our doctors can provide referrals.
• Access online prescriptions in Australia – If medication is needed, our doctors can send electronic prescriptions to your local pharmacy.
• Obtain medical certificates 24/7 – If flu vaccine side effects impact your ability to work, our doctors can issue medical certificates for sick leave.

Protect yourself this flu season and get vaccinated. If you have any concerns, Hola Health’s online doctors are here to help via telehealth.