Many women like to wear safety pants because wearing skirts can prevent them from accidentally taking off their clothes and make their abdomen look flatter, but this kind of tight underwear will bring some unexpected side effects. Richard brake Nell, director of the physical therapy clinic in Bristol, UK, believes that putting pressure on the lower abdomen will cause gastric acid to flow back to the esophagus, leading to heartburn. Over time, it will also cause inflammation and ulcers, and in extreme cases, it will cause esophageal cancer. At the same time, the artificial pressure exerted by safety pants on the stomach will make the diaphragm unable to sink when women breathe, leading to hyperventilation, panic attack and stress urinary incontinence. Especially when sneezing or coughing, the latter embarrassing situation is more likely to occur.