There is no evidence that eating certain foods can make adenoids smaller, and surgical treatment is the mainstay of reducing enlarged adenoids. Enlargement of the adenoids can be physiologic without clinical symptoms or pathologic with clear symptoms, and is more common in children, especially those under 10 years of age. Pathologic enlargement is often caused by recurrent acute and chronic nasopharyngitis. It may lead to inflammation of the tissues surrounding the adenoids and abnormal maxillofacial development. Adenoid hypertrophy causing sleep apnea syndrome is often considered surgically when conservative treatment is not effective. Early surgical removal of enlarged adenoids is also recommended if accompanied by recurrent or chronic secretory otitis media or sinusitis. It has not been found that eating certain foods alone can make adenoids smaller, so it is important to avoid oily, spicy and irritating foods and eat more fresh fruits and vegetables. If the adenoids are found to be enlarged, it is recommended to actively consult a doctor for a systematic examination and standardized diagnosis and treatment according to the doctor’s instructions.