In most cases there is a small fleshy lump, it is possible that the lymph nodes are locally enlarged and there should be some inflammatory disease around it, such as mastitis upper respiratory tract infection chronic pharyngitis, etc., which can irritate the lymph nodes and thus cause enlargement. It is important to actively treat these inflammatory diseases. It is also possible that the local sweat exudation, local often not clean form local inflammation of the hair follicle. This can lead to significant localized pain. It may also be a subcutaneous lipoma or sebaceous cyst and other masses, which require active improvement of ultrasonography and, if necessary, surgical excision for pathological examination, which is the gold standard for differential diagnosis.