Hi,

I am injecting insulin, Novorapid before meals and Lantus last
thing before bed, using various spots on the stomach.   I have
noticed that at different times the effect of the injection seems
to vary - the amount injected is the same, the food is similar
but the site selected may vary.

Due to previous cancer operations I only use the left hand side
of the stomach area as the right hand side is full of operation
scar lines and thus, is to be avoided.

In some cases it is as if I hadn't done the injection at all.

That has led me to wonder if the injection site can have an
effect on the insulin.  I am aware that we are not a perfect
machine and that we don't always react the same to the same
stimulus so this may be the cause.

I have also noticed that certain areas bleed indicating that I
have hit a blood vessel.   Short of putting a marker on the skin
I don't see how to avoid this happening occasionally.

I would appreciate any feedback that you can give me on these
topics if possible.