Long term emotional stress such as anger, frustration and resentment, or a sudden emotional upset can lead to Liver Qi Stagnation. If untreated for a while, it can then develops to Liver Fire or Heat, which agitates the Blood, As a result an excessive amount of Blood leaks out of vessels. If the Blood Heat happens in the Uterus, it causes the heavy menstruation, sudden flooding or dragged leaking, dark and sticky blood and etc.

External factors such as an excessive consumption of spicy & hot food or alcohol as well as overexposure to hot environment can also cause Heat in the Blood.

The treatment principle is to clear Heat, cool Blood and stop bleeding. Huai Jiao Wan and Qing Re Gu Jing Tang is a good herbal formula for this.