This paper seeks to deepen understandings of the relations between health inequalities and migration, with a particular emphasis on health-selective migration. Papers in this journal have urged for a more nuanced consideration of connections between migration and health but these have not seen-through how to combine understandings of health and migration to better theorise their relations. A strong theoretical basis regarding the politics of mobilities can help say more of the structural factors shaping health-selective migration and therefore, changing health gradients in a population.