Im on omnadren+deca+dbol (dbol already stopped) cycle into the middle of my 4th week, and my ass skin seems to be really hard, i have to push the needle with force till it goes in. Really annoying. I also started injecting into my shoulders - 2 shots already done, needle goes in very easy there, but i received a red spot on the left one which i believe is going to disappear, so thats why i want to ask whether i should continue doing shoulders. I use 23G for shoulders and 22G for glutes. Also
i want to ask in which week i should start seeing notable results ?

What im CURRENTLY taking:

Omnadren 250mg EOD
Deca 400mg, shot 2x a week (every 3.5 days)
Niacin 250mg ED
tamoxifen 10mg ED (5 morning 5 evening)
Vitamin B6 50mg ED (25 morning 25 evening)

I also wonder if it is possible the niacin to be related in some way to the hard skin.

That's it, waiting for your answers, thanks.