The stratum corneum is that top dead-skin layer everyone talks about; a damaged barrier means it's like your castle walls have crumbled, letting everything irritate you. People say it just means dry skin, but my eczema history says it's a full-time sensory hell—itching isn't a symptom, it's the entire plot. My childhood was measured in steroid tube sizes and the gritty feel of moisturizer on raw skin, not pH levels.
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