Eating blood clam inappropriately can bring harm, including allergic reaction, pathogen infection, elevated uric acid and so on. 1. Allergic reaction: blood clam is rich in protein, which can form allergens and cause allergic reaction in some people after entering human body. Patients may have itchy skin, rash symptoms, allergy should be used with caution. 2. Pathogen infection: If blood clam is not cooked, pathogens can cause gastroenteritis symptoms or other infectious diseases such as parasitic diseases. Eat blood clam must pay attention to the safety, must be cooked before eating. 3. Elevated uric acid: Eating blood clam can supplement a variety of nutrients, rich in protein, a variety of vitamins, a variety of minerals, etc., but if eaten too much may elevate uric acid, high uric acid patients are not recommended to eat blood clam. If eating blood clam produces harm, we should actively consult the doctor, under the guidance of the physician in accordance with the standardized treatment.