Why do my inverted nipples look like this? How do I fix them? (Photo)

I've had inverted nipples my whole life, but I've never noticed how abnormal that was until a few years ago. I bought nipplets about a year ago and have used them here and there. I'm really concerned about how odd my nipples look when they're protruding outwards. They don't look like normal nipples. They're really bumpy like they're deformed. Why does it look like this and what can be done about it?