Lymphedemas in head and neck regions is common but often has been ignored. In fact, head and neck lymphedema may cause dysphagia, speech problems and stridor when it happens in oral, pharyngeal or laryngeal areas. It not only affects the appearance of a patient who has lymphedema in head and neck regions, but also causes social withdrawal and lowers life quality. This article introduces the fundamental concepts of head and neck lymphedema and the crucial works which the speech therapists have to do.