It's still not exactly understood how the mechanism behind allergies works.
One consensus, though, is that stress plays a significant role.
Excessive stress and allergic disorder have been linked together in clinical practice for hundreds of years.
For years, many allergic conditions have been considered psychosomatic disorders that have worsened outcomes in patients with high levels of stress.
The nervous system and immune system are closely related.
Researchers have found that stress and allergies provoke similar inflammatory responses and that stress enhances the immune system's already extreme reaction to allergens.
Chronic stress can also wear out your adrenal glands, which produce the anti-inflammatory hormone cortisol.
Without enough cortisol to subdue the allergic response, your symptoms can become even more severe.