The phenomenon of a child fainting when he or she cries too much may be a breath-holding seizure, a type of neurological seizure. Breath-holding seizures are a type of neurological seizure in childhood. When children are subjected to physical factors or emotional stimuli, they may have an attack, which often manifests itself as hyperventilation, apnea, limb tonus, etc. In severe cases, there may even be a brief loss of consciousness and limb spasms. In general, this symptom does not last for a long time and usually does not require special treatment and can usually recover on its own, but if the breath-holding time is too long, it may cause damage to the brain. Therefore, it is recommended that parents should educate their children correctly in normal times, and if their children experience intense mood swings, they must be pacified in time. The child will faint if he cries too much, there may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.