Eating during menstruation will not gain weight, this statement is not personally believed to be valid. There is no factor during menstruation that will cause eating not to gain weight, as long as it is eating more, less exercise, energy accumulation down, certainly will gain weight. If you do not pay attention to diet, overeating, or eating a lot of high-calorie, high-carbohydrate, high-fat diet during menstruation, you will certainly gain weight. Diet during menstruation is more or less the same as usual, and it is important to eat healthily, such as emphasizing on dietary diversity and nutritional matching, and not over-starving, over-full, over-cold or over-heating. Eating something too spicy during menstruation leads to too much fire and heat in the body and heavy menstruation. Don’t eat things that are too cold and chilly either, as they can lead to heavy periods or cause pain.