There are many reasons why people don’t have appetite during menstruation, the main reasons are as follows: 1, during the menstruation period because their bodies have not fully recovered, the body’s resistance is too poor, so there will be a weakening of the bowel movement, poor digestion and other problems, which affects their appetite. 2, during the menstruation period because of the body damage is greater loss of blood, and after the miscarriage of their own pressure and physical pain is also greater. 3, it may be because of the usual low activity, the diet during the period is particularly light, which leads to bad mood, loss of appetite. The more big, will lead to postpartum mood, loss of appetite and other problems. 3, may be because the usual amount of activity is too little, the monthly diet is particularly light and lead to poor appetite, many people prefer spicy food, eat light food will appear bad appetite symptoms, and long-term inactivity may also appear constipation, which leads to decreased appetite.