What are the symptoms of poisoning from eating kelp?

　　Symptoms of seaweed poisoning include gastrointestinal discomfort, neurological symptoms, skin and mucous membrane abnormalities, respiratory symptoms, and circulatory system disturbances. The onset time of symptoms is related to the cause of poisoning and the amount ingested, with significant variation in severity. If any physical discomfort occurs, it is recommended to seek medical attention promptly.

　　1. Gastrointestinal discomfort: This is often the first sign, manifesting as nausea, vomiting, abdominal pain, and diarrhea. Vomitus may contain remnants of seaweed, and diarrhea is typically watery. In severe cases, it may be accompanied by bloating and loss of appetite. These are typical reactions caused by toxins irritating the gastrointestinal mucosa.

　　2. Neurological symptoms: These may include dizziness, headache, and fatigue. In severe cases, symptoms can progress to blurred vision, limb numbness, and altered consciousness. Some patients may become agitated or excessively drowsy. These effects are associated with toxin-induced impairment of nervous system function, with symptom severity varying according to the degree of poisoning.

　　3. Skin and mucous membrane abnormalities: A minority of patients may develop skin itching or rashes, primarily distributed on the trunk and limbs. Some may also experience lip numbness or facial flushing. In severe cases, swelling of the skin and mucous membranes may occur, reflecting an allergic or irritant reaction to the toxins.

　　4. Respiratory symptoms: These appear in more severe poisoning cases and include chest tightness, shortness of breath, and rapid breathing. Some patients may also have coughing or throat discomfort. If toxins affect the respiratory center or cause laryngeal edema, breathing difficulties may develop, necessitating vigilance for the risk of suffocation.

　　5. Circulatory system abnormalities: These are mostly seen in severe poisoning cases and present as palpitations or a sensation of heart racing. In serious instances, patients may develop low blood pressure and cold extremities, with a few experiencing arrhythmias. These result from toxin-induced cardiovascular dysfunction and circulatory disturbances, requiring prompt intervention.

　　Before consuming seaweed, it should be thoroughly washed to remove surface impurities and potential contaminants. Choose fresh seaweed without unusual odors, cook it completely, and avoid eating raw or spoiled seaweed to reduce the risk of poisoning.