Dengue haemorrhagic fever in two female tourists to Thailand (1990) and Indonesia (1989) respectively, is reported for the first time in the Netherlands. The main symptoms directly after return were high fever, haemorrhagic exanthema, thrombocytopenia and in one patient signs of haemoconcentration. Initially both patients were treated with antibiotics. They recovered after intravenous fluid therapy; one of them received a thrombocyte transfusion. Increasing travel to Asia and South America will result in more tourists returning with this potentially serious arboviral disease (dengue haemorrhagic shock).