<s>[INST] Hello doctor, Do adenoid glands contract after a certain age? Is it natural for all people? What to do if these glands are enlarged and result in air obstruction? [/INST] Hello. About your query regarding adenoids, I would like to say these are lymphoid tissue located at the roof of the nasopharynx and as usual, they are meant to protect the body from infections. They are always found in infants and they are at their maximum size at the age of 5 years, after that, they start regressing in size up to 8 years if the nasopharynx is free from infection. On the other hand, if an individual is having recurrent respiratory tract infections in childhood, the adenoids will grow up to a large size. </s>