Women should not drink mash during their menstrual period. Mash is an alcoholic beverage made from grain, and drinking too much mash during menstruation can lead to increased menstrual blood, prolonged menstrual periods, and blood clots, which can cause menstrual disorders in serious cases. Women should not drink alcoholic, spicy, stimulating or cold drinks during menstruation to avoid adverse stimulation of menstruation, dysmenorrhea and health problems. When women are menstruating, they should pay attention to proper rest and eat more hot, easily digestible food, such as millet porridge, carp soup, etc., which is conducive to a comprehensive supply of nutrients, helps the smooth discharge of menstrual blood, and is also beneficial to the body’s recovery. If women want to drink mash, it is best to drink it after the menstrual period.