I was pinning this morning & a tiny drop of oil came out so I googled how to prevent it & this came up.I can't believe I never heard of this before.I have used my thumb & forefinger to "spread" the skin apart while pinning a quad & that's very effective for reducing pain & just makes for a smoother pin.
Z-track injection
http://www.nursingcenter.com/upload/static/592775/Take5_Ztrack.pdf
Z-track injection
http://www.nursingcenter.com/upload/static/592775/Take5_Ztrack.pdf