What is a intradermal injection?

An intradermal injection is a type of injection that is administered into the skin layer, just beneath the top layer of skin called the epidermis. It is commonly used to administer small doses of medication or vaccinations, such as for tuberculosis or allergy testing.

The needle used for intradermal injections is typically shorter and thinner than the needle used for traditional injections, and the injection is usually given at an angle of 5-15 degrees. The amount of medication injected is also generally smaller (usually only 0.1-0.2 ml), so as to ensure it stays within the dermis layer of skin.

Immediate reactions to an intradermal injection may include redness, swelling, and itching at the injection site. However, these reactions are typically mild and subside within a few hours. Proper administration of an intradermal injection can help reduce the likelihood of complications.