The answer to 'why is my stink bug swarms' is that stink bugs are common household pests that can congregate in large numbers, especially in the fall as they seek warm places to overwinter. Stink bugs are attracted to light and often find their way into homes through cracks and crevices, where they can quickly multiply and become a nuisance.
Stink bugs typically become more prevalent in late summer and early fall as they gather in groups to prepare for the winter months. They feed on a variety of plants and can cause damage to crops, gardens, and ornamental plants. While they don't pose a direct threat to human health, their unpleasant odor and tendency to invade homes can make them a frustrating problem for homeowners.