Although amenorrhea is no longer a specific criterion required to make the diagnosis of anorexia nervosa (AN), the relationship between restrictive eating and menstrual status remains important in the diagnosis, treatment, and consequences for patients with eating disorders. Clinicians should understand the relationship between menstrual irregularities and malnutrition due to eating disorders, as it may be possible to intervene sooner if the diagnosis is made earlier. Treatment of AN (in those who are underweight) and atypical AN (in those who are not underweight) is aimed at cessation of restrictive thoughts and behaviors, restoration of appropriate nutrition and weight, and normal functioning of the body. While eating disorder thoughts and behaviors are helped by both therapy and nutrition, regular functioning of the body, including regular menstruation, is linked to both appropriate nutrition and weight. Patients who are not underweight based on their body mass index (BMI) may still have oligo/amenorrhea due to their caloric restriction; thus any patient who has irregular menses should have a detailed dietary evaluation as part of their workup. Timely diagnosis and treatment of patients with eating disorders and amenorrhea is important due to the impact on bone mass accrual for adolescents who have prolonged amenorrhea. Menstrual abnormalities may also be seen in patients with bulimia nervosa (BN).

尽管闭经不再是诊断神经性厌食症 (AN) 所需的特定标准，但限制性饮食与月经状态之间的关系在饮食失调患者的诊断、治疗和后果中仍然很重要。临床医生应了解月经不调之间的关系和饮食失调引起的营养不良，因为如果及早做出诊断，可能会更早地进行干预。AN（体重过轻者）和非典型 AN（体重不轻者）的治疗旨在停止限制性思想和行为，恢复适当的营养和体重，以及身体的正常功能。虽然治疗和营养有助于饮食失调的思想和行为，但身体的正常功能（包括规律的月经）与适当的营养和体重有关。根据体重指数 (BMI) 体重不轻的患者可能仍会由于热量限制; 因此，任何月经不调的患者都应该进行详细的饮食评估，作为他们检查的一部分。进食障碍和闭经患者的及时诊断和治疗很重要，因为长期闭经会影响青少年的骨量增加。神经性贪食症 (BN)患者也可能出现月经异常。