Pimples under the ear root mainly refers to sebaceous cysts under the ear root, this disease is very common, the reasons are mainly the following: 1, with the patient’s own habits, diet habits and other factors have a relationship. For example, patients often eat spicy, stimulating food, often eat greasy, not easy to digest food, often stay up late, fire, fast work rhythm, poor sleep, rest, etc.. This can lead to endocrine dysfunction in the body, which can easily induce overproduction of sebaceous glands, resulting in obstruction of sebaceous ducts, thus forming a buildup of sebaceous glands and forming sebaceous cysts. 2. This part of the patient’s body is prone to the attachment of secretions, which can easily induce bacterial infection. Once the bacteria enter the sebaceous cyst, it can also lead to infection of the sebaceous glands, which can manifest as pus, pain, or even the formation of abscesses and other related manifestations.