Sudden weight gain can be caused by a lack of diet or by illness. If you don’t eat well, overeat, and don’t pay attention to exercise, it is easy to cause the accumulation of fat, which in the long run will lead to rapid weight gain. Certain diseases can also cause rapid weight gain, such as endocrine disorders, will cause the body’s metabolism to be disturbed, so that rapid weight gain. So usually in the diet life should pay attention to, don’t overeat, also don’t eat too much sugary food, pay attention to a reasonable diet, as well as appropriate exercise. If diet is excluded and rapid weight gain occurs, it is recommended to go to the hospital immediately for examination to see if it is caused by diseases, and if it is caused by diseases, it is recommended to be treated as soon as possible and recover as soon as possible.