What is intradermal injection?

Intradermal injection is a medical procedure in which a small amount of medication is injected into the skin layer, between the dermis and the epidermis. This technique is used for various purposes, such as allergy testing, tuberculosis testing, and some vaccinations.

The needle that is used for intradermal injection is very small and thin, typically 26 to 30-gauge. The injection is administered at a shallow angle, usually about a 15-degree angle, and the medication is deposited in a small wheal or blister on the skin's surface. The dose of medication for intradermal injection is generally smaller than that used for intramuscular injection.

Intradermal injection is a relatively painless procedure, although some people may experience mild discomfort or itching at the injection site. The most common side effect of intradermal injection is redness and swelling at the injection site, which usually resolves within a few days.

Intradermal injection is a safe and effective way to deliver medication to the body. However, it is important to follow proper injection technique and sterile procedures to avoid infection and other complications.