Bird’s nest is a kind of dietary supplement, which can be consumed in moderation by the general population except those who are allergic to protein. Therefore, there is no scientific basis for the claim that patients with breast enlargement should not eat bird’s nest, and it is not true. Bird’s nest is a nest made of the saliva and down feathers of swiftlet, which is mainly composed of water-soluble protein (about 50% by dry weight), fat (about 20% by dry weight) and trace elements such as calcium, phosphorus and iron, etc., which can be consumed in moderation by the general population except for those who are allergic to protein, which is not suitable for consumption. Mammary hyperplasia is a benign lesion caused by malfunction of normal development and degeneration of mammary glands, which is often associated with certain endocrine dysfunction disorders. Patients with mammary hyperplasia should try to avoid foods containing certain hormones, such as royal jelly, etc., and consuming bird’s nests appropriately will not adversely affect their condition.