The following symptoms of mild poisoning caused by eating seafood are manifested: 1. neurological damage and gastrointestinal manifestations. Neurological damage, mainly patients will appear headache, dizziness, weakness and other symptoms; gastrointestinal reactions will mainly appear nausea, vomiting, abdominal pain, diarrhea, poor performance and other phenomena. All due to individual seafood contains toxic ingredients or seafood is not fresh, eaten after the poisoning reaction. 2, individuals who ate seafood mild poisoning symptoms is a kind of allergic reaction, symptoms manifested as headache, dizziness, whole body scratching, swelling of the face and other phenomena. Some people have serious symptoms, there will be breathing difficulties, asthma and other situations, such patients are more critical, can lead to respiratory failure and endanger the lives of patients, should be immediately sent to the hospital for treatment.