Swelling sensation in the lower abdomen may be caused by gastric ptosis, pelvic inflammatory disease and other diseases. Swelling in the lower abdomen may be caused by gastric ptosis, which means that when a person stands up, the position of the stomach is low, the lower edge of the stomach hangs down in the pelvis, and the lowest point of the curvature of the stomach falls under the iliac spine, which will cause swelling in the lower abdomen, indigestion, constipation and other symptoms, which can be treated by taking oral medicines such as Domperidone and Mosapride under the guidance of a doctor. Swelling in the lower abdomen may be caused by pelvic inflammatory disease, which is a chronic inflammation of the pelvic tissues due to infectious diseases of the upper reproductive tract of the female, which may cause swelling in the lower abdomen, leucorrhea, high fever, etc. It can be treated by applying medicines such as cefoxitin, azithromycin, etc., and it is recommended to take surgical treatment if the effect of medication is not satisfactory. Therefore, patients with swelling sensation in the lower abdomen should go to the hospital in time and receive standardized treatment under the guidance of the doctor.