The ear is an important organ of the human body, in charge of the human body’s hearing and balance function. The auricle is a part of the outer ear, attached to the side of the skull by ligaments, muscles and cartilage, and at an angle of 30 degrees to the skull, the normal shape of the auricle has an important impact on human aesthetics. For normal people, the outer ear is a good organ for various benign and malignant tumors, such as common hemangiomas, cortical cysts, pigmented nevi and keloid scars. So how should we be aware of these diseases of the outer ear that may bother us? Auricular hemangiomas Hemangiomas are highly variable in location and can be located in a number of places such as the earwheel and the groove behind the ear. When we find new organisms in these places, reddish in color, soft in texture when pressed, and fading with pressing the skin, and then filling up with blood again when lifted, we should be alert to the possibility of hemangioma. Hemangiomas can grow slowly and spread and make surgical removal more difficult, so when there is a high suspicion of hemangioma, surgery should be performed as soon as possible to remove the tumor. Recurrence is rare after surgery. Keloid scars are mostly seen in young women with pierced ears and can be as large as a fava bean. Most of the scars are related to infection and body type, so girls who love beauty must pay attention to avoid infection, and never make holes in the cartilage, and if they are keloid, they will try to avoid ear trauma. If the unfortunate occurrence of keloid hyperplasia affects the aesthetics, it is also necessary to operate as early as possible to avoid the damage of local repair after the removal of huge keloids. Pigmented nevus Mostly seen in middle-aged and old people, with large differences in morphology, most of them are accompanied by pigmentation, which can be smooth and round-like, or black-brown papillary or even lobulated. Nevus pigmentosus has the possibility of malignant transformation, so once found, should be consulted as soon as possible. In addition, sebaceous cysts, fibromas, papillomas and other benign masses and squamous cell carcinoma, malignant melanoma and other malignant tumors are common in the auricle. If they are not treated actively, they will cause auricle loss and greatly affect the aesthetics and even the life of the auricle. The auricle will often be exposed to external mechanical friction, susceptible to low temperature, and in the side of the head where human vision can not reach, resulting in a variety of small lesions can not be noticed and slow development. Therefore, we should take extra care of our ears, and once we find any kind of abnormality, we must consult the doctor in time.