Toothache chin there is a lump when pressed pain is considered to be the emergence of apical periapical inflammation, lymph node swelling and other diseases. 1. Periapical inflammation, clinically, this symptom may occur after the appearance of periapical inflammation due to the collection of secretions around the root tip, which may produce periapical abscesses. 2. Enlarged lymph nodes, if there is dental inflammation, dental inflammation spread to the lymph node area may induce lymphadenitis, so there will be symptoms such as swollen lymph nodes, if the lymph node swelling is more serious, may produce a lump on the chin when pressed on the symptoms of pain. If the symptoms are more obvious and the pain worsens, it is recommended to actively consult a doctor for examination and treatment so as not to affect one’s personal life.