The feeling of swelling in the lower body is related to factors such as inflammatory stimulation of the reproductive organs, urinary tract infections, bulging of the vaginal wall and uterine prolapse. 1. Inflammatory stimulation of reproductive organs: in the event of acute vaginitis, acute cervical, acute pelvic inflammatory disease, usually triggers women to feel a sense of swelling in the lower body, a sense of falling, accompanied by vulvar itching, increased secretions and other symptoms. 2. Urinary tract infection: when girls have acute urethritis, acute cystitis, usually also cause lower body sensation of swelling, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms of urethral irritation. 3. Expansion of vaginal wall: due to multiple vaginal deliveries and other causes of vaginal wall tissue relaxation, elasticity, etc., the vaginal wall before and after the occurrence of tissue expansion, resulting in swelling of the lower body. 4. Prolapsed uterus: Mostly due to the post-partum pelvic floor muscle laxity has not been well repaired, the uterus prolapses and causes a feeling of swelling in the lower body. Clinical girls who feel a swelling sensation in their lower body need to go to the hospital in time for examination, to clarify the cause of the disease, and to treat the cause of the disease.