Silent sleep apnoea, a lesser-known variant of obstructive sleep apnoea (OSA), can have severe health implications despite the absence of loud snoring. According to Dr. Crystal Cheong from the National University Hospital in Singapore, many patients do not exhibit typical symptoms yet may suffer from moderate to severe sleep apnoea. This condition can lead to excessive daytime sleepiness, morning headaches, and frequent urination at night. Experts warn that silent sleep apnoea can cause significant drops in blood oxygen levels, increasing the risk of serious conditions such as diabetes, hypertension, and even dementia. While wearable devices can provide some insights into sleep patterns, they are not a substitute for formal sleep studies, which are crucial for accurate diagnosis. Treatment typically involves CPAP therapy, which helps maintain airflow during sleep. Patients are encouraged to monitor their symptoms and seek medical advice if they experience unexplained fatigue or cardiovascular issues.