There are many reasons for a pimple next to the ear, such as skin diseases, fistula infection in front of the ear, lymph node inflammation and so on. 1. skin disease: skin next to the ear if the sebaceous cysts, folliculitis, can lead to a pimple next to the ear phenomenon, mainly due to the sebaceous glands secretion, pore blockage. 2. Infection of fistula in front of the ear: If the fistula in front of the ear or behind the ear is infected and causes an inflammatory reaction, it can lead to pus accumulation in the fistula and secretion gathering, which can form a lump and lead to the phenomenon of a pimple next to the ear. 3. Inflammation of lymph nodes: Infection of organs close to the ear can lead to inflammation of the lymph nodes in the ear, resulting in swollen lymph nodes, and therefore a lump next to the ear. There are many reasons for the growth of a lump next to the ear, it is recommended to go to the hospital in time to improve the examination of the symptoms, under the guidance of the doctor to take standardized treatment, do not ignore the symptoms, take it lightly.