I recently got sent a video of someone injecting using the 4mm needle technique. In this video I explain the best angle of entry for this technique, how to use this technique safely to lower the risk of bruising and injury and demonstrate this on a 3D digital model so that you can see all of this in action under the skin.
![](https://i.ytimg.com/vi/DDT-Kjcp0VE/maxresdefault.jpg)