Hirudoid 20% Azelaic Acid Acne Treatment Essence Cream: Professional-Grade Spot & Redness Correction**

Technical Overview**

Engineered by a pharmaceutical powerhouse with a 33-year heritage in dermatological science, the Hirudoid 20% Azelaic Acid Acne Treatment Essence Cream represents a clinical-grade solution for persistent skin imperfections. This high-potency formula leverages a 20% concentration of Azelaic Acid (壬二酸), a dicarboxylic acid clinically proven to regulate keratinization and inhibit acne-causing bacteria. By integrating pharmaceutical expertise with advanced skincare delivery systems, this 祛痘精华 (acne essence) provides a dual-action approach: neutralizing active inflammation while simultaneously addressing post-inflammatory hyperpigmentation.

Key Features and Ingredients**

High-Concentration 20% Azelaic Acid:** A gold-standard therapeutic dose that targets the root causes of acne, effectively managing sebum production and refining skin texture.

Patented Heparinoid-like Soothing Agent:** Utilizing Hirudoid skincare technology, this patented ingredient (ZL 2023 1 1253271.X) mimics the restorative properties of heparinoids to stabilize the skin barrier and minimize the irritation typically associated with high-acid concentrations.

Rapid Redness Neutralization:** Specifically formulated for 红肿痘救急 (emergency relief for swollen acne), the cream is clinically tested to show visible reduction in redness and inflammation within 4 hours of application.

Performance Specifications**

Blemish Correction:** Effectively works to 淡化痘印 (fade acne marks), promoting an even skin tone by inhibiting melanin synthesis.

Pore Refinement:** Provides comprehensive 控油去黑头 (oil control and blackhead removal) by dissolving follicular plugs and preventing future comedones.

Pharmaceutical Pedigree:** Developed by A-Zhi Pharmacy (喜辽妥 background), ensuring rigorous quality control and ingredient purity that exceeds standard cosmetic requirements.

Applications and Usage**

This treatment is designed for individuals struggling with inflammatory acne, hormonal breakouts, and oily skin congestion. Due to the high potency of the 20% Azelaic Acid, it is suitable for localized spot treatment or thin-layer application on affected areas to manage sebum and texture.

Maintenance and Tolerance Building**

To achieve optimal results without compromising the skin barrier, a "tolerance building" protocol is essential for all users:

1. **Sensitivity Test:** Perform a patch test on the inner arm or behind the ear before facial application.

2. **Phase 1 (Days 1–3):** Apply to affected areas and leave on for 5–10 minutes before rinsing off.

3. **Phase 2 (Days 4–7):** Increase contact time to 20–30 minutes before rinsing.

4. **Phase 3 (Day 8+):** Once no discomfort is felt, the product can be left on for full absorption.

Note: Mild tingling, itching, or slight redness is a normal physiological response to high-concentration acid as it begins to work. If persistent irritation occurs, reduce frequency or consult a specialist.*

By combining the clinical legacy of 喜辽妥 with modern active ingredients, this essence cream offers a professional pathway to clear, balanced, and resilient skin.