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 has severe trouble breathing while awake, has blue or grey lips, cannot be woken normally, or has breathing that does not restart promptly.
These are not typical features of simple snoring.
Seek same-day medical advice if sleepiness is creating a driving, machinery, or workplace safety risk.
Do not drive or do hazardous work while struggling to stay awake.
Book a routine appointment if snoring is frequent, very loud, getting worse, or affecting your sleep or relationships.
You should also arrange an assessment if another person notices breathing pauses, gasping, or choking.
Make an appointment if you regularly wake with headaches or feel unrefreshed, irritable, forgetful, or sleepy during the day.
A child who snores regularly should be discussed with a healthcare professional, especially if there is mouth breathing, disturbed sleep, behavior change, or difficulty concentrating.
Every sign above is quoted from the sofidex article on Snoring. If you are not sure, err upward — it is always reasonable to be checked.