Women with hard lumps on the left side of the navel mostly consider three causes: the first point abdominal wall nodules, commonly seen in abdominal wall lipomas, fibroids and sebaceous cysts, are mostly well-defined masses, hard or soft in texture, clearly demarcated from surrounding tissues, but not very large in size, mostly within two centimeters. The second point of intra-abdominal nodules, mostly dilated colon, such as descending colon and sigmoid colon, often cause local intestinal dilation due to intestinal obstruction and intestinal dysfunction, and harder masses can be palpated in the abdomen. The third point of intra-abdominal tumor, commonly in the abdominal cavity gastrointestinal tract mesenchymal tumor, colonic malignant tumor, local masses are hard in texture, mostly can not be pushed, and the demarcation with the surrounding tissue is still obvious, after colonoscopy, abdominal CT examination can be clearly diagnosed.