Understanding Inflammation after Injection

Swelling and irritation (inflammation) at the site where the needle entered the skin can occur after any injection. This is an allergic reaction to the needle or the medicine injected. It could also be a reaction to both. It's possible that the reaction will occur right away. It could also begin several hours after the injection. The reaction is usually not serious and goes away on its own. Swelling and irritation

Relief

What causes swelling after an injection?

The skin's reaction to the needle or medicine is the most common cause. An allergic reaction to the medicine is a less common cause. It's also possible that you have an infection at the injection site. What causes swelling after an injection?
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