Most sub q injections are done mainly in the abdomen region by pinching the skin, in areas that have smaller amounts of subcutaneous fat such as the deltoids and thigh, if ones bf% is low one may risk the possibility of an oil embolism If injected into a vein. Same as IM If performed wrong. So I prefer sub q in the abdominal area.
As I've heard of some people sub q'ing in their calves, bi, tri's, I'm not saying this is a suggested area for I wouldn't do it.
Sub q pinch.