Tmi Nipple

Hey guys , my nipples have this sort of cracks and weird things in them and I don't know what it is or anything it doesn't hurt but it's so weird I haven't been able to find anything that could be causing it my OB said to keep them moisturizers but I honestly see no help . They don't hurt or nothing but can anyone tell me why or if they has it ? My last pregnancy I had them too and then they diminished in size but they're huge again . Yes they're gross looking 😔