Fire in the small intestine is a condition in Chinese medicine, which is mainly caused by excessive fire in the heart and downward movement of the small intestine, mostly due to overly spicy diet or prolonged staying up late, insomnia, etc. The main manifestation of fire in the small intestine is the symptom of excessive fire in the heart. The main manifestation of the heart fire symptoms, but also accompanied by the symptoms of fire in the small intestine. The heart fire manifests as heartburn, insomnia, palpitations, panic, mouth and tongue sores, etc., the small intestine has heat mainly manifested as urinary urgency, frequent urination, urinary pain, yellow urine and other manifestations. Men with small intestine fire can be appropriate oral clear heart fire medication for treatment, clinical often use guide red pill for treatment, the effect is very good.