You can hardly pay no attention to hunger. Hunger has many different causes, according to Dr. Monique Tello, from Harvard Medical School.
The first cause may be medical problems. "If a person always feels hungry and can't put on weight or even loses weight, he should go to the hospital. For people with Type 1 diabetes (糖尿病), their body isn't able to process sugar (分解糖).They eat a lot, but still lose weight and they feel terrible." Tello said.
If it isn't a medical cause, the problem could be in the head. It's reasonable to be hungry every three to five hours. However, you are likely to eat often and a lot after watching food advertisements on TV or social media. Also, the more you eat, the larger your stomach gets, and the more you want to eat. A person's state of mind can play a role, too. Research has shown that stress can increase levels of ghrelin (饥饿激素).Pressure and worry can send people looking into the fridge when they're not truly hungry.
Another reason may be the lifestyle. Sometimes the reason why a person is always hungry is that he eats too little, exercises too much, or both.
So, what are the solutions? First, reduce your time on watching food advertisements on TV and social media. In addition, say no to food if you're not really hungry. Finally, change your diet by eating more food high in fiber (纤维), protein (蛋白质) and healthy fats.