5 months pregnant, feel the phenomenon of tight belly, which belongs to the normal performance, because during this period of fetal growth is relatively fast, so it will show a tight belly, especially primigravida feel tight belly is more serious, if it is a woman who is pregnant, the belly is more loose there will be no obvious phenomenon of tight belly. There is another possibility that the belly tightness is in the abdominal distension symptoms, feel the belly tight, this phenomenon should be accompanied by indigestion symptoms, loss of appetite, or nausea and vomiting phenomenon. It is possible that during this period will also be accompanied by irregular bowel movements, diarrhea or constipation, this situation can usually moderate more walking, to promote gastrointestinal motility, in terms of diet also need to pay attention to. Do not eat spicy stimulating food and too greasy food.