The common reasons for the falling sensation in the small abdomen in early pregnancy include: 1, physiological reaction, after pregnancy, due to uterine congestion, edema, for the pelvic tissue will produce stimulation, if pregnant women walk too long or stand for too long, will aggravate the symptoms of pelvic congestion, causing a feeling of falling in the lower abdomen; 2, pre-eclampsia, pre-eclampsia symptoms are the most common abnormal phenomenon in early pregnancy, this phenomenon occurs When this phenomenon occurs, it will be manifested as lower abdominal drop, pain, not relieved after rest, and accompanied by bleeding in the vagina; 3, pelvic inflammatory disease, chronic pelvic inflammatory disease before pregnancy or acute pelvic inflammatory disease after pregnancy with poor personal hygiene habits will cause lower abdominal drop, accompanied by lumbosacral pain, abnormal leucorrhea outflow in the vagina; 4, bladder stimulation, after pregnancy, the uterus will increase the pressure to stimulate the bladder, causing the corresponding clinical symptoms If you do not empty the urine in the bladder on time or suffer from inflammatory diseases in the bladder, it will cause the painful feeling of lower abdomen.