What it is
Cytokines are the molecular language of immune coordination in skin.
Different cytokine axes underlie different conditions, which is why modern targeted therapies focus on specific pathways such as IL-17 or IL-23 in psoriasis, or IL-4/IL-13 in atopic dermatitis.
Why it matters
Understanding cytokine axes clarifies why the same word — 'inflammation' — can mean very different biology across conditions.
