premenstrual syndrome
noun [ U ] uk/priːˌmen.stru.əl ˈsɪn.drəʊm/ us/priːˌmen.stru.strəl ˈsɪn.droʊm/ (UK also premenstrual tension)
经期前综合征
a condition in which some women experience pain and swelling in particular parts of their bodies, and feelings such as anxiety, anger, or unhappiness for a few days before their period (= flow of blood each month)