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How can there be cysts on the buttocks of the elderly?
Disease analysis:

Hello, is this ischial tubercle cyst? With the increase of age, the hormone level in the body gradually decreases, subcutaneous fat gradually decreases, muscles and ligaments gradually shrink, synovial bursa also undergoes degenerative changes, and fluid secretion decreases. In addition, some elderly people are thin, working at their desks for a long time or having the habit of sitting cross-legged, which makes it easy for the ischial tubercle to "collide" with stool. There is also long-term unreasonable friction, squeezing, weight bearing and trauma, which will lead to traumatic bursitis over time, and this bursitis mostly occurs on one side of the ischium, which may be related to the imbalance of sitting power. After bursitis occurs, congestion, swelling and serous exudate in the capsule increase, and the exudate will become sticky, cellulose will be deposited and adhesion will occur for a long time. At this time, the wall of synovial sac thickens, the surface of synovium is rough, and finally a cyst is formed.

Guiding opinions:

Suggestion: improve the seats. If you are used to sitting on wooden chairs and hard benches, you can sit on rattan chairs or sofas instead. Pay attention to sitting posture. It is necessary to change bad sitting habits, for example, don't cross your legs or sit cross-legged for a long time when sitting, and try to make the ischial tubercles on both sides bear the weight of the upper body evenly to avoid unconsciously thickening the thin waves and causing lesions. Don't sit still at ordinary times. After sitting for half an hour to 1 hour, stand up, stretch your waist, bend your legs and exercise your muscles.