What is the Angle for an Intradermal (ID) Injection?

An Intradermal (ID) injection must be strictly inserted at an incredibly shallow angle of 5 to 15 degrees almost completely parallel to the skin surface.

• The massive human skin has an outer dead layer (Epidermis), a thick middle layer (Dermis), a deep fat layer (Subcutaneous), and massive muscle at the absolute bottom.
• An 'Intradermal' injection literally means 'Inside the Dermis'. Because the massive needle goes in almost flat (10 degrees), it physically slides just beneath the extremely thin outer Epidermis and securely deposits the medicine exactly into the highly sensitive, shallow Dermis layer.

The Dermis has massive amounts of nerves but very few massive blood vessels. This means the medicine is absorbed extremely slowly, creating a highly localized reaction.

• Allergy Testing: Doctors massively inject tiny drops of suspected allergens into the dermis. If you are highly allergic, a massive, itchy red bump will instantly form on that exact spot.
• TB (Tuberculosis) Test: The highly famous 'Mantoux Test' for TB is strictly done via a massive Intradermal injection on the inner forearm.

A highly successful Intradermal injection always produces a massive, visible physical result. Because the medicine is trapped right below the top layer of skin, it violently pushes the skin upward, instantly creating a highly visible, tiny, mosquito-bite-like bubble called a 'Bleb' or 'Wheal'.