Usually, you can use lotus leaves (50g) to soak him in water (don't boil) for him to drink. I don't think defecation is very good This will make him defecate smoothly, and he can stop drinking when he loses weight to a healthy weight. This has no effect on the child's development.

Make him laver and egg drop soup (without egg yolk) at dinner every day. Don't make it too salty and light. Let him finish the soup before eating (about a bowl, before lunch and dinner, this soup is rich in nutrition but less in calories, so you will eat less after drinking the soup). Eat a fixed amount of rice at most, eat more vegetables and cook more meat (you have your reasons for being fat, you are too used to him and like it).

Do not eat instant noodles, potato chips, KFC and other snacks, do not drink drinks, drink boiled water. This food is prone to endocrine disorders (too many additives) and acne.

Exercise, play basketball, play football, or suggest taking part in more group activities. Everyone will not feel bored after playing together for a long time, five times a week, for more than an hour at a time. This is not only good for the body, but also good for the spirit. The stomach is mainly for eating. If you eat less, you will naturally become smaller. First, chest obesity, and then endocrine disorders, eating more snacks.

If he realizes that he doesn't lose weight and is laughed at by his classmates, he must stick to the above: exercise more and give up all snacks, drinks and fast food. Eating too much fruit is also easy to get fat, because there is more sugar, and vegetables are still the main ones.