Pelvic aggregation has little to no effect. Pelvic aggregation refers to a treatment where pressure is applied around the pelvis to bring it together. The pelvis is the fibrocartilage and ligaments and muscles that are distributed around the gap between the bones directly connected to the gap. In a normal adult without any disease, simply wanting to make the pelvis narrower, the following phenomena may occur after using pelvic aggregation treatment. Firstly, damage to the joints between the pelvises can lead to significant local pain, inflammation, oozing, and even significant swelling. Secondly, once the normal pelvis is subjected to binding forces it can cause ligaments and muscles around the pelvis to relax. This is similar to the atrophy and weakness of most of the muscles in the limbs of a patient who has been bedridden for a long time. Instead of making the pelvis smaller, it will become larger.