| Daytime symptoms | Night-time symptoms |
| Excessive daytime sleepiness | Snoring |
| Sense of unrefreshing sleep | Observed apnoeas |
| Chronic tiredness | Choking episodes |
| Morning headaches | Abnormal movements |
| Irritability | Diaphoresis |
| Apathy | Frequent arousals |
| Depression | Nicturia (adults) and enuresis (children) |
| Difficulty in concentrating | Nightmares |
| Memory loss | Restless sleep |
| Reduced sex drive | Insomnia |
| Personality changes | Gastro-oesophageal reflux |