You shouldn't be ashamed of your body. However, if you're embarrassed about your nipples showing through your shirt, there are a few quick fixes for you. All you have to do is alter the way that you dress. So if your nipples are always showing through your shirt, but you want that to change, here are a few simple ways to prevent embarrassment:
1. Wear Pasties over Your Nipples
Pasties are meant to cover up your nipples. If you're walking around without a bra on, then it's a good idea to wear them. Of course, if your bra is so thin that your nipples are still visible through your shirt, you can wear pasties with your bra. There's nothing stopping you from buying them, because they aren't expensive at all.