empathy (noun):
ability to understand and share feelings of another
A BMI between 18.5 to 24.9 is considered healthy. below is considered underweight. 25 to 29.9 is overweight and above 30 is obese
It also can be due to depression. people ends up having a hard time and they just don't know what else to do. they end up taking the wrong path and try to hide this pain
