Michael thanks for the input!

Some confirmation on your thoughts:

-it was the Deca injections that are causing the red hotness
-it was 1 out of 4 injections that were red and hot, consistent with your 25% rule
-I injected between .3 and .5 in each of the spots. The one that was worst was the .5ml


Additional info:
-this deca is mixed from two different labs. It hasn't crashed. I didn't warm it up this time though. This was the fourth of four, and I bet the heavier oil (250mg/ml instead of 200mg/ml) was pushed in last and the source of the irritation.
-I'm thinking the front of the stomach is more sensitive than the sides
--I injected at 90 degrees and not 45, which I just read is a bad idea

Question:

-How deep should I be injecting subq? Insulin needles put that right at a half inch. I'm using 1 inch 25 gauges, but not all the way in.