Obstructive sleep apnea is characterized by repetitive episodes of complete or partial collapse of the upper airway during sleep. Prevalence of obstructive sleep apnea is favored in men more than woman with a ratio of 2-4:1. Risk factors include nasal obstruction, obesity, gender, craniofacial anatomy, and smoking. Reoccurring symptoms, such as daytime sleepiness and irregular snoring have lead scientists and doctors to further find appropriate means of diagnosis. Polysomnography is proved to be the golden-standard method for diagnosing obstructive sleep apnea. Other diagnostic tools include taking a home apnea test. Positive airway pressure and oral appliances are the two most common non-invasive devices used to treat obstructive sleep apnea. Surgical procedures, like uvulopalatopharyngoplasty and maxillomandibular advancement are the most effective surgeries, especially in severe cases. Obstructive sleep apnea also arises complications and side effects that do not only affect the patient’s physical health but also impact their social and mental well-being; however, there are means to prevent it and lead a healthy lifestyle. In this review, the abovementioned aspects of obstructive sleep apnea are focused on and supported in detail.