Diabetes affect hundreds of millions of people worldwide, a large majority of them living in low- and middle-income countries. Yet finding effective strategies, tools and policies for effectively managing this chronic illness—especially amid war, displacement or exclusion from care—is a neglected area of humanitarian medicine. Here we present a cross-section of work on this front by MSF and collaborators. Several studies assess the shift towards community-based, nurse-led models of care in rural settings. Others explore obstacles to diabetes care for war refugees living in camps in Jordan or Lebanon, highlighting how health programs can adapt to their needs. The demonstration that insulin retains potency for 30 days if cooled without refrigeration is opening doors to more patient self-management, as a case study in remote South Sudan shows. At the same time, MSF and others call for regulatory and financing policies that make diabetes medications and supplies cheaper, better adapted to humanitarian settings, and far more available to patients whose lives depend on them.