Tips to Manage Sore Arm After a Flu Jab

It is common for the arm to feel sore, tender, or achy after receiving a flu vaccine. This is usually a normal reaction to the vaccine and a sign that the body is building immunity. The soreness or tenderness may be more pronounced after the second dose of a two-dose vaccine, such as the flu vaccine given to children.

The soreness or tenderness typically lasts for a day or two and can be managed with over-the-counter pain medications, such as acetaminophen or ibuprofen.

How can I reduce the soreness in my arms after the flu shot?

There are a few things you can try to reduce soreness in your arm after receiving the flu shot:

●     Take an over-the-counter pain medication. OTC medications that can be used to alleviate soreness or discomfort include: 

○     Nonsteroidal anti-inflammatory drugs: NSAIDs such as ibuprofen (Advil, Motrin) and naproxen (Aleve) can help reduce inflammation and pain.

○     Acetaminophen (Tylenol): This medication can help reduce pain and fever.

○     Topical creams and ointments: Topical pain relievers containing menthol or capsaicin, can be applied directly to the skin to help reduce soreness and discomfort.

●     Apply a cold pack or ice pack to the injection site for 10 to 15 minutes at a time to help reduce swelling and numb the area.

●     Avoid using the arm that received the flu shot for heavy lifting or strenuous activity for a day or two to give the muscle time to recover.

●     Massage the injection site gently to help improve circulation and reduce soreness.

●     Drink plenty of fluids and stay well-hydrated to help flush any inflammation out of your system.

Is heat or cold better for injection site pain?

Both heat and cold can be effective at reducing pain and swelling at the injection site. Cold therapy, such as using an ice pack or cold pack, is typically the best choice for the first 48 to 72 hours after receiving the injection. Cold therapy can help numb the area and reduce swelling by constricting blood vessels and reducing blood flow to the area.

After the initial 48 to 72 hours have passed, you can try using heat therapy to help reduce muscle spasms and soreness. Heat therapy can help improve circulation and relax the muscles, which can provide relief from soreness and stiffness. You can use a heating pad, warm compress, or take a warm bath or shower to apply heat to the affected area.