As with foods, positive scratch and blood tests are not very reliable for diagnosing an allergy to airborne substances. In some cases, AD actually worsens during allergy shot therapy, even as the allergy symptoms are improving. Many older AD children and adults recognize a relationship between stressful occurrences in their lives and their AD flare-ups. Anger, frustration, and embarrassment all may cause flushing and itching. The resultant scratching can cascade into perpetuating dermatitis.
Low humidity dries the skin, especially during winter months when homes are heated.
Keeping thermostats set low and wearing fewer bedclothes, to prevent night sweating, are two ways to combat the problem. The only problem with exercise is that the resultant sweating generally causes itching. Layers of clothing can be removed to avoid overheating. Strenuous exercise is best avoided when a flare-up occurs. The best line of defense against AD is prevention, but flare-ups rarely can be avoided.