A bulge from the chin to the throat first requires a hospital visit for neck ultrasound to confirm the diagnosis, which generally has two etiologies. First, local lymph node enlargement, which is an associated symptom due to acute inflammatory infection. When the inflammation is severe, breakthrough of the lymphatic vessels will cause enlargement of the corresponding area. Common causes include acute tonsillitis, acute pharyngitis, acute periodontitis, etc. On examination, an oval bulge in the lower jaw is visible, hard and painful with pressure pain. In the treatment, the primary cause needs to be treated first, and symptomatic anti-inflammatory treatment can be given orally with cefixime, amoxicillin, and penicillin V potassium tablets, which can be cured in about a week. Second, thyroglossal cyst. This is a congenital disease often in the middle of the neck, the laryngeal node can be found on the bulge, smooth surface like egg yolk, no pain when touched, immovable, will continue to increase, the patient does not have any symptoms. It requires surgery, which requires general anesthesia and post-operative application of antibiotics to avoid local infection, and can be healed and discharged in about a week.