**2. Causes**

The cause of anorexia is currently unknown [1]. Research suggests that a combination of certain personality traits, emotions, and thinking patterns, as well as biological and environmental factors might be responsible [5]. Cultural factors also play a role, where societies that value thinness have higher rates of the disease. Additionally, it can be found among those involved in activities that value thinness, such as high-level athletics, modeling, and dancing [6]. Diagnosis for the disease requires a significantly low weight and the severity of disease which is based on body mass index (BMI) in adults is classified as; mild disease having a body mass index of greater than 17, moderate a body mass index of 16 to

17, severe a body mass index of 15 to 16, and extreme a body mass index which is less than 15. For children, a body mass index for age percentile of less than the 5th percentile is often used [7].
