What is an intradermal injection?

An intradermal injection is a type of injection that is administered into the uppermost layer of skin known as the dermis. The needle is usually shorter and finer than those used for other types of injections, and it only penetrates a small amount of the skin, usually at an angle of 10-15 degrees.

Intradermal injections are commonly used for allergy testing, tuberculosis (TB) tests, and cosmetic treatments such as Botox. They can also be used for vaccination purposes in certain situations.

The advantages of intradermal injections include higher precision, reduced risk of injury to underlying blood vessels and organs, and better absorption of the injected substance due to the abundance of blood vessels in the dermis. However, they require a certain amount of skill and expertise to administer properly, and the small dose can sometimes be difficult to measure.

Possible side effects of intradermal injections may include swelling, redness, and itching at the injection site. In rare cases, serious adverse reactions such as allergic reactions or nerve damage may occur. Consult with a healthcare provider if you experience any concerning symptoms following an intradermal injection.