In most cases, the soft mass behind the ear is the lymph node behind the ear, depending on when the mass was found and how it changed during this period of time. If the mass is not red, swollen, or painful, and if it does not increase in size very quickly within a short period of time, and if similar masses appear in other parts of the body at the same time, most of them are lymph nodes behind the ear and do not require special treatment. The symptoms mentioned above can be determined by ultrasound or cytology through aspiration. If the mass tends to increase in size within a short period of time, it is important to seek medical attention as soon as possible, and if necessary, surgery may be required to remove the mass and confirm the diagnosis with a pathological biopsy. Most lymph nodes behind the ear are normal, and not everyone has them. If it does not affect normal life and is observed regularly, there is no need to be particularly worried.