Originally Posted by
Lemonada8
it has nothing to do with lactic acid.... lactic acid is a by-product of glycoloysis, when there is insufficient O2 in the blood...
the injection pain is due to a couple of different things...
A) you are injecting a foreign substance in your body, into a pocket of muscle, so you are stretching out hte muscle with the oil which will cause some pain aka virgin muslce
B) The oil is then just sitting in your muscle. Think of the oil in the muscle as a deep muscle bruise (because you should be injecting it at least a inch deep) the deep muscle bruise is when blood pools in the muscle and that is painful... the oil is the same way but it goes away faster than a legit bruise because there is no tissue damage to repair, its just the dispersion of fluid into the muscle. Thats why some tips to help injection pain are to heat the oil (makes it thinner and easier to spread in the muscle), take a NSAID(ibuprofen) because it will help remove the 'artificial' swelling ( the oil in the muscle belly), massaging the muscle to help disperse the oil
C) the content of BA can also play a factor, however i dont know this pain because i home brew my gear and its painless, just feels like a bruise. THis pain is described as a burning pain which is from the hydrogen on the -OH group on the alcohol... the free hydrogens can trigger pain signals on nerves.
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