3 doctors weighed in:
Why does my arm hurt after getting a flu shot?
3 doctors weighed in

Dr. Chong Kim
Internal Medicine
1 doctor agrees
In brief: Muscle inflammation
Flu vaccines are generally injected into the deltoid, the muscular part of the arm. It causes inflammation of the area and followed by a slight immune reaction (desired effect).
So, your arm/deltoid should be sore for 1 to 2 days following the injection.

In brief: Muscle inflammation
Flu vaccines are generally injected into the deltoid, the muscular part of the arm. It causes inflammation of the area and followed by a slight immune reaction (desired effect).
So, your arm/deltoid should be sore for 1 to 2 days following the injection.
Dr. Chong Kim
Dr. Chong Kim
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Dr. Jeffrey Gorodetsky
Family Medicine
In brief: Flu shot
Giving any vaccine involves injecting a substance into the skin or muscle of your arm. Even though it will provide protection against whatever virus or bacteria it is intended for, it also can occasionally cause a short-term local inflammatory reaction.
This is why you can get arm soreness after any vaccine. Usually treating with ice packs to the area for a day or two takes care of the problem.

In brief: Flu shot
Giving any vaccine involves injecting a substance into the skin or muscle of your arm. Even though it will provide protection against whatever virus or bacteria it is intended for, it also can occasionally cause a short-term local inflammatory reaction.
This is why you can get arm soreness after any vaccine. Usually treating with ice packs to the area for a day or two takes care of the problem.
Dr. Jeffrey Gorodetsky
Dr. Jeffrey Gorodetsky
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Dr. Sahba Ferdowsi
General Practice
In brief: Inflammation
You have inflammation from the trauma of the injection however if it persists it could be an infection.

In brief: Inflammation
You have inflammation from the trauma of the injection however if it persists it could be an infection.
Dr. Sahba Ferdowsi
Dr. Sahba Ferdowsi
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