Background: thyrotoxicosis is a hypermetabolic state due to excessive amounts of thyroid hormone in the circulation. There are several causes and the worst presentation is a thyroid storm, which is an endocrinal emergency. Clinically, thyrotoxicosis can present vaguely leading to misdiagnosis and mismanagement. Aim of the work: this study aimed to understand the clinical presentation of thyrotoxicosis, its diagnosis and ways of management. Methodology: we conducted this review using a comprehensive search of MEDLINE, PubMed, and EMBASE from January 1987 to March 2017. Conclusion: due to its vague presentation, thyrotoxicosis can be misdiagnosed and managed wrongly, leading to life threatening condition called thyroid storm. Health care physicians must keep a high degree of suspicion in order to provide prompt therapeutic measures to avoid complications as well as death of patient.