What are the main reasons why the body is prone to "heatiness"?

Main reasons why the body is prone to "excessive internal heat" (fire-heat syndrome): 1. Individual constitution: Some people are inherently of a "hot" constitution, such as those with yin deficiency and yang hyperactivity, who are more susceptible to fire-heat symptoms. 2. Improper diet: Long-term consumption of spicy, greasy, and stimulating foods—such as chili peppers, hot pot, and barbecued items—can lead to accumulation of internal heat, triggering fire-heat symptoms. 3. Irregular作息 (daily routine): Frequent late-night activities, insomnia, and restless sleep disrupt the body's natural balance and increase the risk of developing excessive internal heat. 4. Emotional factors: Prolonged stress, depression, or anxiety can disturb the body’s yin-yang balance, leading to fire-heat conditions. 5. Underlying diseases: Conditions such as gastric ulcers, enteritis, and gastritis may impair digestion and subsequently trigger fire-heat symptoms. To prevent excessive internal heat, it is recommended to maintain healthy lifestyle habits, including balanced nutrition, regular作息 (sleep patterns), and effective emotional management, and to seek medical advice when necessary.