Dr. Shereene Idriss on Instagram: "Red, itchy, bumpy skin out of nowhere? It might be an allergic skin reaction But if your redness is persistent—with bumps, flushing, and sensitivity—it could be rosacea, not a one-time allergy. Here’s how to calm redness (when used correctly): ✅ Azelaic Acid – Calms inflammation + fades discoloration ✅ Centella Asiatica – Soothes and strengthens the skin barrier ✅ Sulfur – Targets redness and acne-like bumps ✅ Zinc – Reduces irritation and supports barrier repa