1. Chocolate: Catecholamines in chocolate can lead to emotional instability and sugar addiction. If you eat more chocolate during menstruation, it is likely to cause a large number of monosaccharides in chocolate to enter the body, stimulate a large amount of insulin secretion, and make blood sugar drop instantly, thus stimulating appetite. If you are afraid of getting fat but want to eat sweets during menstruation, you can actually insert starchy foods such as pasta, whole wheat bread and cereal during menstruation. 2. Zanthoxylum bungeanum, clove and pepper: the menstrual period should be as light as possible, eat more nutritious food, and eat irritating and spicy food during menstruation, which will stimulate vasodilation and cause premature menstruation and menorrhagia. Pepper, clove and pepper are all ingredients. When cooking, adding some can make the food taste better. However, menstrual women should not eat these spicy and irritating foods, otherwise it will easily lead to dysmenorrhea and menorrhagia. 3. Crab: Avoid eating cold things during menstruation, especially crabs, which are cool in nature, clear away heat and cool blood, and dissipate blood stasis, especially those suffering from cold dysmenorrhea. 4. Snails: Snails are cool and have the effect of clearing heat. Therefore, avoid eating cold things such as snails during menstruation. 5. Pear: Avoid eating more raw pears during menstruation. 6. Persimmon: Persimmon contains tannic acid, which is easy to combine with iron, thus hindering the body's intake of iron in food. Because a lot of blood is lost during menstruation and iron needs to be supplemented, persimmon should not be eaten at this time. 7. Watermelon: Menstrual women should fast. 8. Bamboo shoots: Because bamboo shoots are cold and contain more crude fiber and insoluble calcium oxalate, women should avoid eating them during menstruation. 9. Salt: Eating salty food before menstruation is harmful. Too salty food will lead to an increase in salt and water reserves in the body, and symptoms such as headache, excitement and irritability will appear before menstrual cramps.