What Causes Anorexia Nervosa?

Aug 15, 2022 Source: Cainiu Health

Dr. Zhao Haiming

Introduction

Anorexia nervosa is a psychiatric disorder, and decreased appetite can stem from numerous causes—most commonly poor eating habits, leading to diminished interest in food and selective or picky eating. Treatment primarily focuses on correcting unhealthy dietary patterns and establishing sound eating habits. Although the prevalence of anorexia nervosa is relatively low, its mortality rate is high; thus, prompt medical intervention is essential upon diagnosis.

Many women develop anorexia nervosa after weight loss, yet remain unaware of its underlying causes. So, what causes anorexia nervosa?

What Causes Anorexia Nervosa?

Anorexia nervosa is a psychiatric disorder, and decreased appetite can stem from numerous factors—most commonly poor dietary habits, such as diminished interest in food or selective eating. Treatment primarily focuses on correcting unhealthy eating behaviors and establishing sound dietary routines. Although the prevalence of anorexia nervosa is relatively low, its mortality rate is high; thus, prompt medical intervention is essential upon symptom onset.

To date, the precise pathogenesis and etiology of anorexia nervosa remain incompletely understood; it is considered a multifactorial disorder. While numerous potential causes exist, clinical cases are most frequently linked to dietary and lifestyle factors. Unhealthy habits—such as excessive snacking or consuming large quantities of beverages before meals—can disrupt digestive enzyme secretion and suppress appetite. Additionally, anorexia may arise secondary to gastrointestinal disorders, including acute or chronic hepatitis, diarrhea, peptic ulcer disease, or constipation. Therefore, patients are advised to seek evaluation by a specialist at a hospital to identify the underlying cause and initiate appropriate treatment.

Anorexia nervosa predominantly affects adolescents, with a higher incidence among females than males, and carries a significant mortality risk. Consequently, individuals exhibiting symptoms of anorexia must seek timely medical care to prevent complications. Regarding dietary management, family members are encouraged to supervise meals to help establish healthy eating habits and prevent food refusal or wastage. We hope this article has been helpful. Wishing you a joyful life and good health!

View All

Early Symptoms of Anorexia Nervosa

Symptoms of anorexia nervosa may include abnormal behaviors. In the early stages, typical manifestations primarily involve behavioral changes, such as refusal to eat, selective eating, excessive exercise, diarrhea, and nausea. Physical changes may also occur. In severe cases, patients may exhibit extreme emaciation, sleep disturbances, and significant weight loss. If any of these abnormal symptoms appear, seek medical attention immediately.

View Full Answer

Early Symptoms of Anorexia Nervosa in Females

Anorexia nervosa typically occurs in girls aged 12 to 18 years and is rare after age 30. Approximately one-third of patients are overweight or obese, and about half have pre-existing psychological issues—such as appetite suppression, significantly reduced food intake compared with normal individuals, or deliberate adherence to a low-calorie diet—prior to onset. Some patients experience episodes of uncontrollable hunger during the course of the illness, leading to intermittent binge eating.

View Full Answer

What Causes Anorexia Nervosa?

Anorexia nervosa may stem from familial and environmental factors—for instance, overly strict parental discipline or excessive emphasis on perfectionism; excessive dependence of the child on parents; childhood abuse; or growing up in a single-parent household. Children affected by these circumstances often display personality traits such as social withdrawal, heightened sensitivity, and poor psychological resilience. Societal factors also play a significant role, particularly the pervasive cultural preoccupation with achieving an excessively thin physique.

View Full Answer

Is summer anorexia normal?

When temperatures rise in summer, body temperature also increases, which may reduce enzyme activity and lead to loss of appetite. At the same time, reduced physical activity during summer can gradually impair digestive function, also contributing to anorexia; this is generally considered a normal physiological phenomenon. However, if symptoms such as abdominal pain, nausea, vomiting, or bloating occur simultaneously, it is abnormal and could be caused by acute gastroenteritis.