Is it OK to wear my bra to sleep?

There's nothing wrong with wearing a bra while you sleep if that's what you're comfortable with.

Sleeping in a bra will not make your breasts perkier or prevent them from getting saggy. And it will not stop breasts from growing or cause breast cancer.

Some women want to wear a bra to bed because it feels more comfortable for them. Your best bet is to choose a lightweight bra without underwire. Some camisole-style pajama tops even come with a built-in bra. The bra you choose to sleep in shouldn't be too tight or have parts that dig in. An uncomfortable bra might make it hard to sleep or irritate your breasts.