A hard lump in the abdomen can be a disease that occurs in the abdominal wall or in the abdominal cavity and requires further examination. For diseases occurring in the abdomen, the common ones are lipomas or fibroids, which are not serious and can be clearly diagnosed with color ultrasound examination of the abdomen, with the option of surgical removal if necessary. There are many causes of diseases occurring in the abdominal cavity, the common ones being occupying lesions, specifically benign diseases as well as malignant diseases. If the lesion gradually increases in size and compresses the adjacent organs of the abdominal cavity, nausea and vomiting occur and intestinal obstruction is induced, which is relatively serious and requires the option of surgical treatment to remove the lesion. Malignant tumors can occur in the intestine or liver, as well as the pancreas, and are prone to abdominal metastases or metastases to distant organs, which are also very serious. Patients diagnosed at an early stage should actively choose radical resection surgery for treatment and need to be reviewed regularly.