Unconscious laughter after cerebral infarction may be caused by pseudo-bulbar palsy or psychogenic reasons, and it is possible to return to normal through examination and rehabilitation training or psychological guidance. 1. Pseudobulbar palsy: it is mainly caused by the damage of cortical brainstem bundles, and involuntary laughter will appear at the onset of the disease, accompanied by choking on drinking water, difficulty in swallowing and other symptoms. After the onset of this disease, swallowing function training, speech function training, cognitive function training can improve the symptoms. 2. Psychiatric causes: when there are speech and body function disorders after cerebral infarction, there is a possibility of suffering from psychiatric diseases. Antipsychotic drugs should be given as prescribed by doctors, and psychological counseling may lead to recovery. If you have involuntary laughter after cerebral infarction, you should consult a doctor for a clear diagnosis in time, and carry out standardized treatment under the doctor’s guidance, so as to recover your health as soon as possible.