What angle should the needle be in relation to skin?

The needle should be inserted at an angle of about 15 to 30 degrees to the skin for most intramuscular injections. For subcutaneous injections, a 45 to 90-degree angle is typically recommended, depending on the amount of subcutaneous fat present. Proper angle helps ensure that the medication is delivered to the correct tissue layer. Always follow specific guidelines based on the injection type and site.