Puffed eggs, or skin eggs, contain both nutritional elements and certain hazards. Skin eggs are alkaline and contain protein, folic acid, vitamins, riboflavin, vitamin B1, calcium carbonate, and many trace elements and minerals such as calcium and iron. In general, healthy adults will not be affected if they eat eggs properly. According to traditional Chinese medicine, skin eggs are cool in nature and have the effects of nourishing Yin and moistening dryness, clearing heat and quenching thirst, moistening the intestines and relieving gas, and cooling fire. In recent years, zinc chloride and copper sulfate are usually used instead of lead oxide in the egg production process, which can greatly reduce the content of lead in eggs. Therefore, there is usually no special harm if the skin egg is consumed in moderation in accordance with national standards. However, because of the cold nature of skin eggs, excessive consumption may lead to anemia, and consumption by the elderly, children and people with cold spleen and diarrhea is likely to aggravate the weakness of the spleen and stomach. The general public should pay attention when consuming skin eggs, and those who are allergic to skin eggs should avoid eating them. In addition, since eggs contain a certain amount of cholesterol, patients suffering from hypertension, hyperlipidemia and other diseases should be cautious in eating them to avoid raising cholesterol and aggravating their condition, and also to avoid eating spoiled eggs to avoid food poisoning.