Which method is recommended for reducing pain during the initial injection?

Injecting at a slow speed is recommended for reducing pain during the initial injection due to several physiological factors. When a solution is injected quickly, it can cause increased pressure within the tissue, leading to a higher likelihood of pain perception. Slower injections provide the surrounding tissues more time to adjust to the introduction of the solution, which can minimize discomfort. Additionally, a slower rate of deposition allows for better dispersion of the anesthetic, thus reducing the localized tissue reaction that might trigger pain.

While using a smaller needle can also have the potential to reduce pain, it is not as directly correlated with the experience of discomfort during the injection. The technique of slow injection is generally more impactful in pain management when delivering local anesthetics.