What should I do if I have a headache after crying all day?

Generally, a headache after crying all day may be caused by tension headaches, elevated blood pressure, or respiratory alkalosis. Appropriate treatment should be based on the underlying cause.

1. Tension Headache: Crying for an extended period may lead to a tension headache due to mental stress or emotional agitation. This type of headache is not caused by organic disease. Relief can be achieved by relaxing and reducing anxiety. If symptoms are severe, medications that support nerve function—such as vitamin B1 or oryzanol—may be taken under medical guidance.

2. Elevated Blood Pressure: Prolonged crying can cause cerebral blood vessel constriction and insufficient blood supply to the brain, leading to increased blood pressure and headaches. In such cases, calming down and getting adequate rest is recommended. If symptoms persist after resting, it's important to visit an outpatient clinic promptly for antihypertensive treatment. Medications such as nifedipine or irbesartan may be prescribed to lower blood pressure and prevent potential cerebrovascular complications.

3. Respiratory Alkalosis: Excessive breathing during prolonged crying reduces carbon dioxide levels in the body, potentially causing respiratory alkalosis, which can also result in headaches. Going outdoors to breathe fresh air may help. If the pain is severe, medical attention is needed and oxygen therapy may be administered at a hospital.