What should I do if my child has toothache and mouth ulcers?

When a child experiences tooth pain or oral ulcers, attention should first be paid to oral hygiene, such as rinsing with mild saline solution or using dental floss to remove trapped food. Tooth pain may be caused by conditions such as dental caries, pulpitis, or apical periodontitis, and timely medical consultation is necessary. Treatment should follow the doctor's recommendations and may include removal of decayed tissue or root canal therapy. Oral ulcers may result from herpes virus infection, hand-foot-and-mouth disease, or internal "heat" (a traditional concept related to bodily imbalance). Symptoms can be relieved through oral medications (e.g., compound borax solution, furacilin solution), topical treatments (e.g., ribavirin spray, stomatitis spray), and dietary adjustments, including increased intake of fresh fruits and vegetables and avoidance of irritating foods. If symptoms are severe, prompt medical attention is advised.