Indeed, there may be cases where the incompatibility of the eight characters could potentially endanger both people's physical health, but this is an extremely rare occurrence with almost zero probability.
The most common manifestation of two people with incompatible eight characters is that they have conflicts and differences in many aspects of life, leading to frequent quarrels.
If two people have incompatible eight characters, it means that their five elements do not benefit each other, but instead intensify one person’s five elements. This is what we commonly call "helping the other person's strength," which makes the stronger person even stronger and the weaker person only follow orders. Such a way of life will cause disharmony in their daily interactions. However, if it leads to physical harm or endangers health, it means that the two people have serious mutual repulsion, which is the most severe form of conflict.
In the "Book of Changes," it is said, “A single yang cannot give rise to life, and a single yin cannot grow.” People believe that everything in the world has cause and effect, and that excess will eventually lead to decline. Therefore, there is no need to worry too much about the incompatibility of the eight characters. If there is incompatibility, there must be a way to resolve it. By improving the feng shui, changing names, choosing auspicious days for important events, avoiding unlucky days, and so on, it is possible to effectively eliminate the negative energy caused by incompatible eight characters.
The eight-character fortune-telling method uses the birth dates and times of two people to assess the compatibility of their innate destinies. However, personal destiny is complex and changeable, influenced by multiple factors such as political, economic, and family environments. Therefore, the most important thing is for the two people to show more tolerance and understanding in their real-life interactions.
Unhealthy conditions and frequent illnesses should be treated with proper medicine. It is essential to trust science, go to the hospital for timely examinations, and undergo scientific treatment. In daily life, focus on improving personal quality of life, follow the principles of health preservation, and arrange life reasonably. Do not attribute every difficulty to the negative impact of incompatible eight characters. It is necessary to correctly understand the eight characters. The calculation of the eight characters is only an initial analysis of the direction of one's fate, which has certain limitations and subjectivity. The purpose of the eight-character calculation is to help people have a general understanding of their fate, thereby better avoiding misfortune and seeking good fortune, leading to a more prosperous and smooth life.

1. Check Whether the Misfortunes and Blessings in the Major Years and Periods Are Synchronized
Start from the year pillar and separately assess the major years of both people. If there are many factors of compatibility between the major years and the current year, it indicates that the two people are relatively compatible. On the contrary, if their fortunes in the current years are unrelated or even completely opposite, it suggests that their marriage is not favorable.
2. Check Whether the Children's Fate Is Compatible
Analyze the gender, number, health, filial piety, and success of the children separately from the eight characters of both people. If one person has no children while the other does, it is considered that their eight characters are incompatible. If the children's fate is roughly compatible, it indicates that their marriage is relatively compatible.
3. Check Whether the Five Elements Are Beneficial to Each Other
Determine based on the principles of the five elements' generation and control. If one person's original fate is not good, and one of the five elements is weak, while the other person's fate provides a supplement or is favorable to the first, it is considered auspicious.
4. Assess the Quality of Marriage Fortune
In the eight-character marriage compatibility, the focus is on the condition of the marital palace of each person. Analyze information related to love, marriage, and romantic relationships. In a man's eight characters, the wealth star represents his wife and marriage, while in a woman's eight characters, the official star represents her husband and marriage. For a man, the regular wealth star represents his wife, while the irregular wealth star represents his mistress. If both people's eight characters are good, and their marriage fortune is positive, and their fates are well matched, then their marriage will be happy and harmonious.