The answer to 'why is my bee trails' is that you likely have a bee hive or nest near your home. Bees leave a scent trail as they travel to and from their colony, which can appear as a 'trail' leading to the hive. This is a common occurrence, especially in the spring and summer months when bees are most active.
The presence of bee trails usually indicates that a bee colony has established itself nearby, either in a wall cavity, tree hollow, or other protected area. Bees will travel along these trails to collect nectar and pollen to bring back to the hive. While bee trails may seem concerning, they are generally not a cause for alarm unless the hive is in an area that poses a safety risk.