Facial paralysis is a facial nerve paralysis. If a 2-year-old child has a crooked mouth, the cause of the problem needs to be further clarified, and it can usually be treated with medication as well as surgery. 1. Drug treatment: Facial nerve palsy can be divided into central and peripheral, idiopathic facial nerve palsy, trauma, infection, etc. can cause peripheral facial paralysis. If idiopathic facial paralysis is considered, glucocorticoid therapy, such as prednisone, can be given. If infection is considered, antibiotic treatment, such as amoxicillin, can be given according to the corresponding pathogen. 2. Surgery: Facial nerve palsy can be caused by intracranial tumor and stroke, therefore, if a 2-year-old child has a crooked mouth, he can be further examined by cranial CT and cranial MRI, and if there is an intracranial tumor, surgery can be considered. Therefore, if a 2-year-old child has facial nerve palsy, he or she should consult a doctor immediately and actively cooperate with the doctor for treatment. The above medications should be used under the guidance of a doctor.