The causes of knee fat pad thickening mainly include: 1, the increase in age, due to the increase in age, resulting in degenerative disease of the fat pad itself, and cause local aseptic inflammatory reaction, the phenomenon of fat pad thickening. 2, chronic injury, mainly occurs in long-term running, doing deep squatting sports, climbing people, due to the excessive pressure on the fat pad of the knee area, over time, resulting in the local 3, trauma, sprains, contusions, bruises, etc., the local fat tissue traumatic inflammation, resulting in local tissue inflammatory edema, adhesions and other fat pad thickening phenomenon, and functional limitations. 4, the existence of abnormal fat metabolism, may also be one of the causes of the thickening of the fat pad of the knee.