The answer to 'why is my ant swarms' is that ant swarms are typically a sign of a new ant colony forming. Ants swarm to mate and establish a new nest, often in the spring or summer months. Common causes include warm, moist conditions, access to food sources, and disturbance of the existing colony.
Ant swarms can be a nuisance, but they are a natural part of the ant lifecycle. While they may seem alarming, swarms are generally not a sign of a serious pest problem. However, if the swarms continue or you notice increased ant activity in your home, it's best to address the issue to prevent a full-blown ant infestation.