In the case of allergies, the nerves supplying the immune system have been damaged by the bones in your spine causing them to be hyperactive. Where a person with a healthy/aligned spine would be able to adapt to a stressor such as an allergen, a person with nerve interference due to a vertebral misalignment views it as a threat and is unable to adapt.

To understand this concept, we can use the analogy of filling up a bucket. The bucket will represent our ability to accommodate, react, and adapt to the various stresses in life. A bucket is made to hold only so much water, or in this instance, stress. To fill our buckets, chemical, emotional, traumatic, and allergic stressors all contribute. As long as our nerves are communicating with our immune systems properly, we can continue to adapt to these forms of stress and our buckets should never reach a point where they overflow.