There is a hard lump under the chin. Depending on the nature of the hard lump, patients can consult different departments: a. If the hard lump under the chin is a superficial soft tissue infection with enlarged lymph nodes, patients can consult general surgery. The swollen lymph nodes can subside on their own without causing serious complications after local infection is controlled by rubbing Bactrim ointment, Fotarine ointment and oral amoxicillin on the infected skin soft tissues. Second, if the hard lump under the chin is a hyperplastic goiter, the patient needs to consult with thyroid surgery. The site, size and nature of the hard lump can be clarified by ultrasound or CT examination of the thyroid gland, and surgery can be performed to remove the hard lump as soon as possible, and most patients can achieve better treatment results.