With distension in the middle of the stomach, this area is likely to be a disease of the small intestine and colon, depending on whether the patient has diarrhea and what he or she ate before the onset. If the patient has diarrhea, it is likely to be functional gastrointestinal disease or acute colitis. If the patient has eaten unclean food or had a cold stomach before the onset of the disease, it is likely to be acute gastroenteritis, which requires routine stool tests plus blood tests to clarify. If the routine stool and blood tests exclude intestinal infections, then this case is considered functional gastrointestinal disease, you can use hot moist towels around the belly button symptoms. If you do not see relief, you can consider using drugs such as Desutex, rectified intestine and multi-enzyme tablets to regulate.