Emergency treatment of tongue bite after rat poison poisoning in a patient with recurrent depressive disorder: a case report.

Background: Recurrent depressive disorder (RDD) is mainly manifested as a low mood, negative and pessimistic mood, and often presents suicidal tendencies when severe. This study reports on a patient with RDD who experienced rat poison poisoning occurring tongue biting. The patient's psychiatric symptoms improved after receiving emergency management and subsequent combined medical care.

Case presentation: The patient was a 51-year-old female with RDD complicated with rat poison poisoning. Tongue bite occurred on the third day of hospitalization. She received emergency treatment. Depression, anxiety and suicide risk assessment, safety management and caregiver-health education were conducted on the day of admission and before discharge. At the follow-up after discharge, the risk of suicide was reduced.

Conclusions: Suicide in patients with RDD is characterized by repetition and complexity. The occurrence of clinical cases involving tongue bite after gastric lavage is rare. Suicide assessment and emergency management play an auxiliary role in the treatment of patients with recurrent depressive disorder.