Acne Severity Grading and Treatment Algorithm (Leeds/GEA Scale)

Grades acne severity using the Leeds revised acne grading and Global Evaluation of Acne (GEA) scales, guides topical retinoid/benzoyl peroxide/antibiotic combination selection, and oral antibiotic duration limitation.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Grades acne severity using the Leeds revised acne grading and Global Evaluation of Acne (GEA) scales, guides topical retinoid/benzoyl peroxide/antibiotic combination selection, and oral antibiotic duration limitation

Each component has a specific meaning:

  • Leeds revised acne grading — The leeds revised acne grading recorded for the scenario being assessed.
  • Global Evaluation of Acne scales — The global evaluation of acne scales recorded for the scenario being assessed.
  • Guides topical retinoid/benzoyl peroxide/antibiotic combination selection — The guides topical retinoid/benzoyl peroxide/antibiotic combination selection recorded for the scenario being assessed.
  • Oral antibiotic duration limitation — The oral antibiotic duration limitation recorded for the scenario being assessed.

Note: Interpret the acne severity grade result against the thresholds and context described above.

How to Use

Enter the Leeds revised acne grading, Global Evaluation of Acne scales, guides topical retinoid/benzoyl peroxide/antibiotic combination selection, oral antibiotic duration limitation for the scenario you are assessing. Grades acne severity using the Leeds revised acne grading and Global Evaluation of Acne (GEA) scales, guides topical retinoid/benzoyl peroxide/antibiotic combination selection, and oral antibiotic duration limitation. Use the acne severity grade result to inform your calculation.

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Frequently Asked Questions