I skip massageing part, rubbing the oil will sometimes cause the Esther's to become lose. When that happens the muscle takes in the hormone fast and leave the crystals, that gives you the pain and irritated spot.

Sometimes a doctor will say massage the area. They sometimes mean to do it before you inject to get more blood flow and in hopes reduce pain.

To be honest it depends on you, how much of the hormone strength, absortion rate, but it could be anything.

I only get pip on heavy cycles, which I stop doing about a year ago. I do small light minimal effective dose cycles.

IMO massaging is placebo if it is mitigating PIP. The preservative compounds that cause the pain go in you whether you rub it over or not. It is important to hold pressure for a minute over the site to arrest bleeding and swelling from the needle itself and this really is the only injection practice that matters. Diluting with sterile oil as mentioned and sticking to 300 mg/ml or less conc solutions also are important to help avoid the PIP.

Ive always massage after injecting.

I don't massage in the major muscles like Quads or glutes but the smaller ones like tri's or rear delts it does seem to help.

By massaging the muscle you increase the area of the depot and decreasing the concentration of the gear In that one spot. You end up with less of a lump that resolves quicker causing less pip resolving over less time. Its a matter of concentration, area and solution. The Depot will more likely stay in solution if dispersed over a larger area. Consider your muscle as a wet sponge drenched in solution . If you concentrate something in the center of the wet sponge and walk away the concentrate slowly dissolves by diffusion but can leave a crystalized lump at the core of the injection. BUT If after you inject you put the sponge in a plastic baggy and squeeze it a few times it disperses the depot more uniformly and exposes it to more body serum that keeps it in solution. Your not injecting crystals. Your injecting solution. It you do things to keep it in solution and not crystalize you will have less pip.

Anyone that thinks human grade prescription gear doesn't cause pip, has never shot primo. I gave up on that shit once mid cycle because I couldnt hardly walk.

That being said, I'd rather pin multiple times a week than run high concentration gear. I remember T400 fucking hurt too.

When you massage the area; you are moving the oil around causing more pain and/or the possibility of scarring since you are effectively pushing the muscles around to accomodate the oil. My Endo told me its a very bad idea. He said a heating pad and a hot soak should help along with Advil or Aleve. If you are using your script it should be very minimal but any ugl varies due to carriers used. So anyone that says PIP is part of the game is buying 10.00 gear. Pharma grade or higher will hardly ever cause PIP. Some of the carriers that are known to cause PIP are EO, and a higher concentration of BA or BB. Any other gear over the normal dose of 250 will cause PIP due to the crystallization of the hormone because you will absorb the oil faster then the hormone which leaves "crystals" that you do not want to massage as that is what is painful. I stay away from those because its not worth missing a training day because you can't move.