The itchier the better. Some people say they dont care for the itch you get when you shoot heroin, but I love it.
I think that you can tell how good dope is somewhat by how itchy it makes you. I love it when you shoot in your hand for example and you can feel the super itchy feeling on your scalp and down to your toes, I think this is what people call a histimine reaction like when you get a rash spread on your body.
Iv also heard that its the morphine more than it is heroin that produces the itch feeling, Im not really sure having never shot any morphine but is that true. Im also talking tar heroin here so I know it containes more unbroken down shit than say true #4heroin, but what ever it is morphine, codine, or idduno I love the shit the itchier the better.
It would disapointing if you didnt get that intense itch right off the bat when you get a good shot, thats how you know you got a goodshot the second you take it and not twenty minutes later when you nod off. Is that how eastcoast and asain dope is? you just nod off, no intense itch all over.