A trigger arrangement for an infusion device is disclosed, the trigger arrangement being configured to trigger a bolus injection of the infusion device and including: a body having an outside surface, a haptic structure arranged on the outside surface or integrated into the outside surface, wherein the haptic structure includes a first end section and a second end section and wherein the haptic structure includes a haptic track extending from the first end section to the second end section, a touch sensitive sensor arrangement extending along the haptic track and configured to detect a sliding motion of an object along the haptic track.