Both obstructive sleep apnea and bronchial asthma are diseases associated with systemic inflammation. The patho-physiology of both these diseases is interlinked and multiple links have been elucidated between their development. How, the development of one of these diseases leads to the worsening of the other one, is poorly understood. This overlap, deserves further research and guidelines need to be crystallized for the management of this condition, as delay in diagnosis and treatment is associated with an adverse outcome.