In addition to normal physiological factors, a ping-pong ball-sized lump felt under the xiphoid process is more likely to be considered as a body surface mass, bone tumor and other diseases. 1. Physiological factors: the xiphoid process is a normal bony structure under the sternum, and some patients may have the xiphoid process protruding outward, which can be touched on the body surface. This is generally a normal phenomenon and does not require special treatment. 2. Body surface mass: such as lipoma, fibroma and other lumps located in the skin or subcutaneous tissue, mostly benign. It is suggested that patients should improve ultrasound, pathology and other examinations in time to clarify its nature and then give appropriate treatment programs. 3. Bone tumor: generally malignant. Malignant lesions in addition to the mass, early pain is not obvious, palpation can be found in the mass of hard texture, etc., need to be combined with the examination to clarify. In addition, subxiphoid viscera are mainly stomach, liver and pancreas, and tumors of these organs may also be palpated as lumps under the xiphoid process. Clinical examination such as ultrasound should be performed to confirm the diagnosis. It is recommended that patients should consult the doctor in time if they find lumps to avoid delaying the condition.