Body Mass Index (BMI) is a way to characterize your heighta and weight stand with regard to normal values, and can be used to determine whether you are underweight, at a healthy weight, overweight, or obese.

A BMI at or above 25 is a risk factor for obesity related conditions:

–back pain
–cardiorespiratory disease
–diabetes, type II
–dyslipidemia (abnormal fats in bloodstream, leading to clogged arteries)
–sleep apnea (trouble breathing while sleeping)
–some types of cancer

and increased risks for any potential surgical intervention:
–difficulties with anesthesia/intubation (putting in the breathing tube)/ventilation (mechanical breathing)
–increased risk of pressure sores and muscle damage
–higher risk of infections, wound problems, hardware (if implanted) failure, and other complications

BMI Categories:

Underweight = <18.5
Normal weight = 18.5–24.9
Overweight = 25–29.9
Obesity = BMI of 30 or greater

A BMI below 18 increases your risk for osteoporosis.

The BMI can be calculated via this link.

On certain occasions, when all non-surgical methods of weight loss have been tried without success, surgical consultations are needed, such as lap band surgery.