A soft protrusion above the posterior end of the abdomen has more causes and is usually associated with abdominal hernia, lipoma, and inflammatory masses. 1. Abdominal wall hernia: mainly includes intra-abdominal hernia and extra-abdominal hernia, most of the patients are caused by congenital developmental abnormalities, or may be caused by acquired tissue defects, there is a relatively soft mass when touching, but the mass will disappear when lying down. 2. Lipoma: a benign tumor of subcutaneous tissue, usually related to sebaceous gland stagnation, can be seen more than one or a single confined mass, the texture is relatively soft, usually without special treatment. 3. Inflammatory mass: mainly due to local or surrounding tissue infection and inflammation of the formation of the mass, such as appendicitis, mesenteric lymphadenitis, mesenteric lymphadenitis, etc., when touched, there is a softer mass, and accompanied by a slight pain. A soft and protruding mass above the posterior end of the abdomen may also be caused by other reasons, such as uterine cancer, ovarian cancer, bladder cancer and so on. It is recommended to consult the doctor in time, complete the examination, make a clear diagnosis and follow the doctor’s instructions to carry out targeted treatment.