Appropriate consumption of melon seeds does not have obvious harm to the human body, but if you often eat a lot of melon seeds may damage the oral mucosa, damage to the teeth, increase body weight and so on. 1. Damage to the oral mucosa: high melon seeds need to go through the mouth, melon shells and oral mucosa repeatedly friction collision, the harder melon shells may scratch or damage the oral mucosa, resulting in mouth ulcers, tongue blistering and other symptoms. 2. Damage to the teeth: melon shells are harder, some people are used to using the teeth to get high on melon seeds, if you use the same tooth in the same position to get high on melon seeds, may damage the teeth, resulting in an increase in the gap between the teeth, dental defects and so on. 3. Increase body weight: melon seeds contain a lot of fat, eat a lot of melon seeds may lead to excessive fat intake, causing weight gain, increase the risk of obesity. Therefore, although melon seeds are delicious, it is recommended to eat in moderation to avoid discomfort.