I always feel uncomfortable in my stomach. 我一直觉得胃不舒服。 I can't keep anything in my stomach. 我胃不能贮留食物(一吃东西就吐)。 I have a gripping pain in the abdomen. 我腹部剧痛。 I have a pain in the lower abdomen. 我下腹痛。 I have a pain in my side. 我腹侧痛。 The right-hand side of my abdomen suddenly began to hurt. 我右腹突然痛起来。 I have an upset stomach. 我肚子不舒服。 I have diarrhea. 我患痢疾。