If you wear shapewear while sleeping, it will cause the following hazards to your body: 1. impede lymphatic reflux, when wearing shapewear, it will lead to poor lymphatic reflux, and the lymphatic system is the body’s largest detoxification system, especially at night when sleeping, the lymphatic system will be fully activated, which helps to excrete excess toxins in the body. The main reason for this is that the heart’s main arteries are the left anterior descending branch, the left gyrus branch and the right coronary artery, and wearing shapewear will make the three main arteries of the heart appear to have poor reflux and insufficient blood flow, so you can’t wear shapewear to bed.