Sometimes, they also feel like they don't fit in or don't belong. Often the problems begin when a person is dealing with a difficult transition, shock, or loss. Girls often experiment with different ways to lose as much weight as possible or to keep their weight down. In extreme cases, this can cause heart problems. Laxatives can cause stomachaches and cramps as well as other serious problems to your digestive system.
Laxatives can become habit-forming.
Self-induced vomiting even once in a while can pop blood vessels in your face and swell up your neck glands. Because your food isn't being digested right, you may suffer stomachaches, constipation, heartburn, or diarrhea. Also, repeated vomiting can ruin your teeth and give you cavities. Diet pills can cause your heart to beat faster and make you jittery. They also are habit-forming.