The hardness above the belly button can be divided into the following cases: 1, superficial tumors above the belly button, such as sebaceous cysts, lipomas, etc., but most of these tumors are benign and will not have any adverse effects on the human body as long as they are removed in a timely manner. 2, umbilical hernia may also lead to the symptoms of a hard lump on the belly button, and the hard lump is not necessarily only above the belly button, but may also appear below the belly button. This is a very common disease, but it can also lead to hard lumps above the belly button. 4. stomach tumors, when patients have stomach tumors, can also cause hard lumps above the belly button. It is recommended that patients should go to the hospital in time for systematic examination after this situation. If necessary, surgical treatment should also be performed as soon as possible.