Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services if someone:
These signs are not typical of uncomplicated enlarged adenoids and may have another cause.
Seek prompt medical advice for repeated breathing pauses, choking or gasping during sleep, significant difficulty swallowing fluids, worsening ear pain with fever, or a marked change in alertness or behaviour.
Arrange a routine appointment if nasal blockage, mouth breathing, or regular snoring lasts several weeks.
Assessment is also appropriate for repeated ear infections, suspected hearing loss, unclear speech, persistent nasal discharge, or sleep symptoms affecting daytime life.
Adults should arrange an assessment for persistent nasal blockage or suspected adenoid enlargement, particularly if symptoms affect one side, include bleeding, or occur with a neck lump or ongoing fluid in one ear.
Every sign above is quoted from the sofidex article on Enlarged adenoids. If you are not sure, err upward — it is always reasonable to be checked.