Is 80 pounds too skinny for a 5' 5 15-year-old?

The ideal weight for a female of 15 years old 5'5" would be 122 lbs. The ideal weight for a male of 15 years old 5'5" would be 125 lbs. The current person's BMI is at 15 A healthy BMI (Body Mass Index) would be between 19 - 25 This suggests that the person is under weight But every individual is different and unique and depending on said persons medical conditions it can affect one's weight. One should consult their physician before being any diets or other plans.