Have Urology Questions? Ask a Urologist Online.
Hello from JustAnswer.
Gravity only plays a minor role in the swelling. The swelling is related to the underlying condition, but once the swelling has occurred, then gravity will tend to cause the swelling to be greater in the lower portion of the anatomic space in which there is the swelling.
Eliminating bacteria that are already present and causing an infection is typically done with antibiotics. However, for someone with chronic or recurrent UTIs, there are some other interventions that can be used to try to prevent the bacteria from causing infection. Drinking plenty of fluids may help, and there has been much use of cranberry juice. There also is a supplement, D-mannose, that may help prevent recurrent UTIs.
If I can provide any clarification, please let me know.