The etiology and pathogenesis of this disease are unknown. Keep the area clean after the disease and do not apply medication indiscriminately to avoid secondary infection and septic chondromalacia and auricular deformity. It is a limited cyst enlargement on the ventral side of the auricle of unknown cause, which is called pseudocyst because the wall of the cyst has no epithelial layer. Patients are mostly male, and the age of onset is usually 30 to 40 years old, mostly occurring on one side of the auricle. 1, Mostly seen in adult males, often with unilateral auricular distention and fullness. 2.The cysts mostly occur on the ventral side of the auricle, with hemispherical elevation, clear boundaries, normal skin color, and hard or fluctuating sensation. 3.Puncture can draw out yellowish or blood-like fluid, which recurs soon after drawing. Differentiate from the following diseases: Contour pseudocyst: It is a sterile plasma exudate in the auricular cartilage, causing reactive exudate accumulation between tissues, resulting in a limited auricular bulge, often without obvious etiology and symptoms are not obvious, some cases only have local burning or ear swelling In the past, the syringe was mostly used to draw out the fluid in the sac and then freeze the area, which is easy to recur. The current use of radiofrequency treatment of this disease, the effect is more satisfactory. Acromegaly: progressive enlargement of the hands and feet, head, thorax and limbs, hypertrophy of the palms of the hands and feet, thickening of the fingers, the distal end is spherical, forehead bulge, orbits, cheekbones, that is, the jaw is obviously prominent, widening of the gap between the teeth, thickening of the lips of the mouth, the bridge of the nose is wide and flat, the ears become larger, hats, shoes and socks, gloves often.