Obstructive sleep apnoea is a disorder leading to repetitive collapse of pharyngeal airway while sleeping. This causes desaturation of oxygen, low oxygen levels in blood and disturbed sleep. The symptoms include snoring, apnoeas, choking sensation, and sleepiness. The pathogenesis of sleep apnoea could be anatomical issue with upper airway, central respiratory control system issues, muscular factors with improper neuromuscular control of the dilator muscles of upper airway. Continuous positive airway pressure, bi-level positive airway pressure, auto-titration airway pressure can be used for management of sleep apnoea. Other treatments include dental devices, surgery, and weight loss.