If you or your child have atopic dermatitis — otherwise known as eczema — then you know how challenging it can be. From red, irritating rashes to (sometimes unpredictable) worsening flare-ups, this chronic inflammatory disease can easily affect your day-to-day life, especially in warmer weather when heat and humidity can make eczema worse. Eczema is more prevalent than you'd probably think. In the United States alone, nearly 18 million children and adults are living with it.