The pain of pressing three fingers below the navel may be caused by sebaceous cysts, occupational diseases of the abdominal wall, digestive system diseases, urinary system diseases and so on. 1. Sebaceous cysts: If there are skin diseases on the surface of the abdominal wall, such as the common sebaceous cysts, there will be redness, swelling, heat and pain after the secondary infection, and there will be pain when pressing. 2. Abdominal wall occupational diseases: such as lipoma, fibroma, etc., these abdominal occupational lesions can cause pain under the navel three finger pressure, some patients can also directly touch the obvious occupation. 3. Digestive system diseases: three fingers below the navel pressure pain, also does not exclude the digestive system diseases, such as acute enteritis, intestinal obstruction, digestive tract tumors, these diseases will also cause abdominal pain, pressure pain will be more obvious. 4. Urological diseases: such as urinary tract infections, cystitis, urethral stones, etc. may cause pain in the belly button under the three finger pressure. It is recommended that patients seek medical attention in a timely manner, carry out the appropriate examination to clarify the cause, and carry out the appropriate treatment under the guidance of the doctor.