| Condition | Sequelae | Symptoms |
| Tonsillar hypertrophy | Upper airway obstruction | Increased resistance to airflow through the upper airway, heavy snoring, marked reduction in airflow (hypopnea), and complete cessation of breathing (apnea) |
| Sleep-disordered breathing | Habitual snoring, oral breathing during sleep, disturbed sleep, daytime neurobehavioral problems such as sleepiness or excessive somnolence, depressed mood, irritability, and cognitive dysfunction | |
| Severe dysphagia | Extreme dysphasia, difficulty eating | |
| Chronic infection *Chronic infection treated with tonsillectomy when unresponsive to medicinal therapy |
Three or more tonsil infections per year | Frequent sore throat with abscess. Persistent foul taste or breath with infection |
| Febrile convulsions | Fever, brief seizures (less than 5 minutes) |