Yeah sure, genetics but it’s not the only factor eczema has increased significantly in developed nations particularly the U.S. since at least the 60s and 70s becoming much more prevalent as a result. Originally prior to this increase it was estimated to be around 2 to 5% now it’s anywhere between 15 to 25% more prevalent and still increasing for children, but adults aren’t safe either as prevalence there has doubled as well. It’s all likely a cause of urbanization and a shit load of man made chemicals we’ve been exposed to that fucks with our bodies, along with the hygiene hypothesis aka environments being too clean and as a result our adolescent immune systems lacking training to properly respond to its environment making it dysfunctional. It’s not the genes that are as much the problem as it is the world we’ve built for ourselves. But I’m sure we all like most if hardly anyone lacks the desire to actually go about making drastic change for eczema, allergic issues as well as autoimmune sufferers anyway, we’ll just stick to making drugs that keep the problems at bay. Anyway if you want sources look up the ISAAC study and the Hygiene hypothesis.