A headache after crying in a healthy adult is likely to be a tension headache, migraine, or a sign of increased blood pressure or cerebrovascular disease. 1. Because of mental tension, excessive ventilation after crying can cause transient ischemia and hypoxia in brain tissue, thus inducing central sensitization of pain-sensitive structures inside and outside the skull and abnormal neurotransmitter function, thus resulting in a tension headache, mainly in the bilateral temporal region, and the symptoms can be relieved after rest. 2. Some migraine patients may be triggered by emotional excitement, headache may appear in one side or both sides, showing vascular throbbing, and may be accompanied by nausea, vomiting and other symptoms at the same time. 3. For some older people with basic diseases, headache after crying and emotional fluctuations should be vigilant, may be elevated blood pressure or cerebrovascular disease aura, blood pressure should be monitored, if necessary, cranial CT examination. It is recommended that patients promptly adjust their emotions, calm down, and drink some warm water appropriately. Patients with underlying diseases should consult the doctor in time, measure blood pressure, and observe the nature and changes of the headache. If the headache persists and cannot be recovered, it is necessary to consult a doctor in time to avoid delaying the condition.