Pregnant 4 months abdomen dull ache how to return a responsibility

Female pregnancy four months lower abdomen dull pain, first need to observe whether abnormal secretions appear in the lower body, if accompanied by brown or red secretions, need to be alert is caused by abortion. Secondly, if this phenomenon does not appear, then consider is this time the fetus develops faster, causing the uterus to increase, abdominal surface fiber tissue rupture caused.