By skyforbes 
As a general rule, dermatologists classify moderate atopic dermatitis as symptoms that cover about 10 percent of the body, says Vij. Severe atopic dermatitis affects at least 30 percent of the body.
The size of your child’s palm is about 1 percent, he explains, so if there are 10 areas the size of their palm affected, your child has moderate atopic eczema. If there are 30 palm-sized areas, your child has severe atopic dermatitis, he explains.
It’s not all about numbers, though. A dermatologist will also look at the impact the condition is having on your child’s quality of life. “There tends to be a stigma that goes along with having rashes on your skin,” says Vij, who points out that it can be particularly hard to cope with eczema that appears on the face.
“It can have an effect on [your child’s] ability to perform in school and socially,” he says.
“Your child’s atopic dermatitis can also interfere with your mental health. If your child is waking up in the middle of the night, every night, because they’re itchy, then you’re going to be waking up as a parent every night,” he says. “It’s going to affect you as a parent and your ability to care for your child.”
In a study published in September 2022 in The Lancet that followed children 6 months to 5 years old with moderate-to-severe eczema, the children who took a 16-week course of dupilumab had at least a 75 percent reduction in signs and symptoms of the condition, including itching and sleep disruption.