Causes of enlarged adenoids include infections, inflammatory stimuli, which cause adenoid tissue to proliferate and enlarge. Adenoids, also known as pharyngeal tonsils, are a loose mass of lymphatic tissue located in the nasopharynx, mostly more common in childhood and often atrophied in adulthood. When the body has an acute infection of the respiratory tract, including the pharynx, it can stimulate inflammatory congestion and enlargement of the adenoids. After the infection and inflammation are effectively controlled, adenoid enlargement can be restored. Chronic inflammation of some nasopharyngeal peripheral tissues and organs, such as chronic rhinitis, chronic sinusitis, chronic pharyngitis, etc., can also repeatedly stimulate adenoid edema and hyperplasia. When adenoid enlargement occurs, it is recommended to consult a doctor in time to clarify the cause of the disease.