A bag under the earlobe is common for the following reasons: First, sebaceous cyst formation, the disease is caused by follicle obstruction, you need to go to the hospital to perform local ultrasound to make it clear that the disease can only be cured by surgery, otherwise the local redness, swelling and ulceration will occur. Second, lymph node hyperplasia caused by the lymph nodes is part of the body’s immune organs, there are many lymphocytes and white blood cells, when the body suffers from exogenous attacks, such as bacterial or viral infections, can lead to its enlargement, generally through the use of clearing the heat and fire medications, such as Shuanghuanglian oral liquid or honeysuckle oral solution, and then give antiviral drugs, antibacterial drugs, if necessary, for treatment, can gradually be relieved, and also need to perform the lymph node hyperplasia. It is also necessary to perform lymph node biopsy to clarify its nature, except the possibility of lymph node metastasis of malignant tumors. Third, fibroma or lipoma and other diseases. In conclusion, if there are obvious localized masses, it is necessary to go to the hospital in time to clarify the cause of the disease.