The disadvantages of sleeping with a bra mainly include the possibility of causing breast hyperplasia, breast cancer, and chest compression. Here are the details:

1. May Cause Breast Hyperplasia

According to research, most breast diseases are caused by wearing an inappropriate bra. The breasts are covered with numerous blood vessels and lymphatic nerves that provide nutrients and metabolism for the breasts. However, if the bra is too small, it can affect blood circulation and supply, leading to breast ischemia and spasms, ultimately causing breast hyperplasia. The fact that bras can cause breast hyperplasia may surprise many women, but the truth is undeniable.

2. May Cause Breast Cancer

Studies have shown that regularly sleeping with a bra can increase the risk of developing breast cancer. Researchers conducted a two-and-a-half-year survey of over 4,700 women and found that women who wore bras for more than 12 hours per day had a 21-fold higher risk of developing breast cancer compared to those who wore them for shorter periods. For women who wore bras even while sleeping, the risk increased to 113 times. The research report pointed out that the increasing incidence of breast cancer in the United States is related to the popularity of bras.

3. Compression of the Chest

Many women choose to wear tight bras in order to achieve a more attractive appearance, as this can give the breasts a fuller appearance and deeper cleavage. However, the effect is mainly achieved through compression, which can lead to chest compression over time, causing symptoms such as chest tightness and shortness of breath. These can have a severe impact on cardiopulmonary function. Therefore, wearing a bra while sleeping can be considered harmful and women should remove their bras before going to bed. In fact, the best way to sleep is naked, as it can help you relax more during sleep, promote better health, and prevent the occurrence of many diseases.