In the case of a cold it is easy to cause fever, sore throat, loss of appetite, and a general feeling of malaise. If the fever is more serious, it can also affect the brain nerves, which can cause an infection in the skull and easily lead to the symptoms of sudden fainting. As the diet is not very good at this time, it is also very easy to have low blood sugar, leading to the emergence of this symptom. At this time, you can let the patient rest appropriately and drink some sugar water. If the symptoms are not relieved and continue to worsen, it is necessary to send the patient to the hospital for a comprehensive examination. It is necessary to do routine blood tests and intracranial CT tests to rule out intracranial infections or intracranial space-occupying lesions, and also to check whether it is caused by epilepsy. Then make a correct diagnosis according to the results of the examination, and under the guidance of the doctor, reasonable medication treatment.