You should not eat bitter melon during menstruation. Bitter melon is cold in nature and belongs to the cool sex. Eating bitter melon during menstruation can easily lead to stagnation of blood and the endometrium will not be easily shed, causing pain in the lower abdomen. You should also not eat other cold fruits during menstruation, such as watermelon, pear, banana, dragon fruit, etc. Avoid eating cold vegetables such as barley and winter melon, which may cause pain in the lower abdomen. During menstruation, pay attention to avoid cold foods, such as popsicles, ice cream, ice water and refrigerated foods. Pay attention to keeping warm during menstruation, you can use hot water to soak your feet every day to promote blood circulation. If the lower abdomen is painful and uncomfortable, you can apply local heat to relieve the pain and soak your feet in ginger water to help improve the symptoms. When using air conditioners during menstruation, try to avoid low room temperature and keep the abdomen warm to avoid getting cold.