Wen Jing Tang, also known as "Warm the Menses Decoction" or "Unblock the Ren Mai Decoction," is a traditional Chinese medicine (TCM) formula used for women's health.
 
In TCM, Wen Jing Tang is used to warm the channels and dissipate cold, dispel stasis and nourish blood. 
By warming the menses, nourishing blood, promoting circulation and reducing blood stagnation, Wen Jing Tang helps to address cramps and regulate the menstrual cycle.