What are the main causes of excessive internal heat (Shanghuo)?

The main causes of excessive internal heat (fire) include: 1. Dietary factors: Long-term excessive consumption of fried, smoked, greasy, spicy, or stimulating foods, as well as warming and nourishing foods, can easily lead to excessive stomach heat. The heat may affect the heart, lungs, liver, and other internal organs, causing symptoms of excessive internal heat. 2. Emotional factors: Prolonged anxiety, depression, or high stress may lead to stagnation of liver qi, which can subsequently cause excessive heart and liver fire, resulting in symptoms of internal heat. 3. Environmental factors: During hot seasons or in dry environments, the body tends to sweat excessively and become dehydrated. Combined with improper diet, these conditions can easily lead to excessive internal heat. 4. Lifestyle factors: Poor habits such as frequent late nights and insomnia with excessive dreams can disrupt the body's biological clock and impair the functions of internal organs, leading to excessive internal heat. 5. Disease factors: Certain diseases, such as gastric ulcers and enteritis, may impair food digestion and subsequently trigger symptoms of excessive internal heat.