The seafood itself does not stimulate the cerebrovascular, after eating seafood headache, you need to consider the following disease causes: 1, allergies, seafood is most likely to lead to allergies, allergies will cause headache, nausea, hypotension, panic, etc., need to go to the hospital for symptomatic treatment. 2, acute gastroenteritis, seafood processing is not clean, easily lead to gastrointestinal discomfort, fever, headache, vomiting, diarrhea, etc., need to monitor the temperature and go to the hospital. 3, cervical spondylosis, eating seafood will appear low, the neck for a long time to maintain a posture, easily lead to local muscle tension caused by headache, can be appropriate massage neck to relieve local muscle fatigue. There are more causes of headache, also consider whether there is hypertension, cerebrovascular accidents, need to monitor blood pressure in the hospital, if necessary, cranial imaging examination to understand the situation.