Although there is much talk about the causes and complications of being overweight, being underweight is also considered unhealthy. This is because being extremely thin and skinny weakens the functioning of the immune system and causes health issues. As the immune system becomes weak, the body easily catches infections like common cold and the flu. One also may develop serious conditions like osteoporosis, anemia and fertility complications. Calculating The Body Mass Index (BMI) is one of the most effective ways to measure if one is underweight or not. Some of the major causes for being underweight are as follows- sickness, bad eating habits, loss of appetite, stress and depression, overactive thyroid, problems with digestion and extreme dieting.
HOW IS UNDERWEIGHT DIAGNOSED?
Regular exercises also increase body energy, and create the urge to eat.