Right lower abdominal occupations mainly originate from right lower abdominal organs as well as surrounding tissues, and the most common occupying lesions include ascending colon cancer, metastatic tumor, appendicular inflammatory mass, ovarian occupations and so on. 1. Ascending colon cancer: wall thickening and soft tissue mass formation may occur and there will be corresponding lesions. 2. Metastatic tumor: right lower abdomen is rich in lymphatic tissues, and some tumors will be transferred to right lower abdominal lymph nodes through lymph. Such as prostate cancer, renal cancer, intestinal cancer, cervical cancer, etc. 3. Appendicitis mass: appendicitis will appear localized exudation, parcel, mass will appear and cause occupying lesion. 4. Ovarian occupying lesion: it mainly includes ovarian cancer and ovarian cystadenoma, etc., which will cause occupying lesion in the right lower abdomen due to local enlargement. In addition, appendiceal tumor, uterine fibroid, tuberculous abdominal lymphadenitis and so on can also cause right lower abdomen occupying lesion. If you find occupying space in the right lower abdomen, you need to consult a doctor for observation and standardized treatment under the guidance of the clinician after confirming the diagnosis.