White froth at the mouth refers to saliva in the form of foam from the mouth, generally common causes are as follows: 1, taking an overdose of drugs. For example, after organophosphorus poisoning, or taking a large number of stimulants, such as opioid poisoning, there will be spitting white foam. 2, neurological diseases. For example, continuous seizures, grand mal seizures, acute stroke, cerebrovascular accident, cerebral hemorrhage, acute cerebral embolism, cerebral infarction, etc. 3, for serious alcohol overdose, alcohol poisoning, there will also be such symptoms. 4, for lifelong diseases, such as rabies, neonatal febrile convulsions, neonatal pneumonia, pediatric epilepsy will have the situation of foaming at the mouth, once the patient has the above situation, must quickly go to the hospital for treatment.