Such a problem should have little to do with Feng Shui. The analysis may be caused by the influence of the surrounding environment of the house. For example, there are tall buildings, trees, or mountains in a certain area around you, which affect air convection. It may also be caused by problems with the design of the house and poor indoor air circulation. If the above analysis is correct, then you can find a solution to the problem - clear the air flow channel! This requires you to provide a schematic diagram and indicate the location (preferably indicate the province and city) for detailed analysis to solve the problem.
If neither of the above two possibilities exists, then it may be a geological problem. One possibility is that geothermal water is gushing out within a kilometer of your house (or maybe farther away), then your house is sitting on a geothermal line, which is difficult to solve. There are ways to solve it, but the cost will be higher than building a house, and the gain outweighs the loss. Another possibility is that this place was once a kiln site of some kind. This is also as difficult to solve as the above problem. But this may be verified by digging a pit near the house. After it reaches more than 3 meters, it will always be the original soil or rock layer, so there is no such possibility. If there are strange substances in the soil or the soil layer changes strangely, it is likely to be a certain type of kiln site. This way it can be solved if there is a water source nearby, otherwise, we have to give up!
If the above analysis is not correct, then please provide detailed information (the floor plan of the house, and draw the relationship within 100 meters around it, and then give the accurate date and time of birth of your couple and the date of building the house. Accurate time) and then make analysis and judgment. That's a matter of feng shui.