What Are the Causes of Being Underweight?
A person is considered underweight if her body weight drops below a healthy range, as designated by doctors or dietary professionals. In many cases, low body weight is associated with lethargy, trouble regulating body temperature, a weakened immune system and, in severe cases, heart complications. Although some people are genetically prone to carry lower body weight, sudden or drastic drops in a person’s weight may indicate serious illness. For best results, discuss your weight-related concerns and other symptoms with your doctor.