CRISPR/Cas9 is a gene-editing tool that enables precise modifi cation of DNA, offering a cure for eczema and psoriasis. It corrects mutations such as those in the fi laggrin gene linked to skin barrier defects in eczema. It also allows modulation of immune responses by targeting cytokine-related genes like IL-17, IL-23, and IL-4/13. Additionally, CRISPR can suppress pro-infl ammatory genes or boost protective factors in skin and immune cells, addressing the diseases at their root cause.