Associate breasts are extra breasts that appear in front of or under the armpits in addition to the pair of breasts on the chest of the human body. Associate breasts can also appear around the normal breasts, in the abdomen and other parts of the body. Associate breasts are mainly related to genetic factors, but also have a certain relationship with fat accumulation. The paratits may also develop breast hyperplasia, breast fibroma and other diseases, and the paratits may also swell significantly with the development of puberty, and may also trigger the phenomenon of underarm pain. It is recommended that patients should go to the hospital to clarify the cause of the disease under the guidance of the doctor and carry out targeted diagnosis and treatment. For patients with small symptoms of paratesticular breasts that do not cause adverse symptoms, they can be left untreated; however, for patients with large lumps of paratesticular breasts that are painful and uncomfortable, they should undergo surgery to remove the paratesticular breasts in a timely manner.