General rule of being happy with progress/how you look is stay at or below 15% BF. So drop a few lbs with sensible dieting (cut out any crap you're eating, and doing cardio) should be enough for a 15...
One side of your body ends up sore? Yeah, we can definitely identify the problem from that description. What body part feels sore? What kind of pain? Jesus OP
Boo phucking hoo. You want to put on muscle mass or you want to go in a cycle of bulk a bit, lose it all to a cut, bulk a bit more and lose it again? wanna look the same in 5 years as you do now?...
I will say... do basic shoulder stabiliser exercises (internal rotations, external rotations etc). I will also say you should be consulting expert advice not the fking Teen Bodybuilding forum.
I talked to a guy today who told me he ate 4000 calories too, and when i worked through it with him, he was eating 1400. not gaining weight? not eating enough. It's a simple formula...
Subcutaneous fat OP. Some have it distributed differently (genetics, reason why some guys have veins at higher BF%) but if there's not much to distribute (when you are sub10% bodyfat) then your veins...