Thread: Bumps on shoulder - pics added

I have been lifting dumbells at home for the last few months and I have noticed bumps on both shoulders and dips on my shoulders too.

I'm thinking is it from lifting or due to posture?
Is it AC discolation? But there's no discomfort and I have full range of motion.

Anyway I can remove these bumps?
Click on my profile on here and see my most recent pics, I've uploaded 6. Let me know your thoughts on what it looks like and what I can do and if its okay to lift again, I just don want to make the bumps any worse but ideally they go down if possible? Cheers boys.