The heart and small intestine

Pathologically, fire of excess type of the heart channel may transmit pathogenic heat to the small intestine, resulting in oliguria, deep yellow urine and burning sensation during urination, known as " excessive heat in the small - intestine. " Conversely, heat in the small intestine may ascend along the channel to affect the heart, leading to symptoms of mental restlessness, redness and ulceration of the tongue, etc.