The bad effects produced by long-term consumption of hazelnuts need to consider the amount of intake each time. Hazelnuts are rich in a variety of nutrients and are energy-dense foods, which will not cause damage to the body when consumed in moderation by healthy people every day. If consumed in excessive amounts, it may lead to red and swollen gums, mouth ulcers and other uncomfortable symptoms. In particular, obesity, gastrointestinal discomfort, unstable blood sugar and other people, long-term excessive consumption may aggravate the condition. Most of the hazelnuts are dried and fried. Long-term consumption or overconsumption may cause dry mouth, thirst and other manifestations, and then symptoms such as red and swollen gums and mouth ulcers, which is also known as fire in Chinese medicine. You should pay attention to drinking water in time after eating, to ensure that you drink enough water, and try to control the amount of consumption. People with higher weight and less exercise consume a lot of hazelnuts for a long time, which may make the oil in hazelnuts accumulate in the body and make further weight gain. The presence of gastrointestinal diseases, such as chronic gastritis and other people, long-term consumption of large amounts of hazelnuts, may be due to the accumulation of fat in the gastrointestinal, and feel greasy, gastrointestinal discomfort symptoms, etc.. Because hazelnuts contain high fat, produce more energy in the body, diabetics or people with unstable blood sugar may increase blood sugar after long-term consumption, affecting the effect of blood sugar control.