Comparing Short to Standard Amoxicillin Course for Erysipelas

Inclusion Criteria: * Patients ≥ 18 years * Affiliated to a social security scheme * Who have given written consent according to local regulatory requirements after the nature of the study has been explained to them, and prior to any protocol specific procedures being performed, * Clinical signs of lower limbs erysipelas ≤ 5 days defined as: o Warmth, erythema, edema (induration of the skin and/or subcutaneous tissue) and/or pain (NRS≤8) * Shiver, feverish sensation or fever experienced by the patient ≤ 5 days or fever measured by the physician ≥ 38°C * Severity score ≥ 3 scored on three criteria: edema, erythema, pain with the following scales (0= none, 1=moderate, 2=severe) * Absence of erysipela ≤ 12 months * Absence of blisters * Absence of solid purpura (purple tablecloth not erasing at vitro-pressure) * Absence of cutaneous necrosis * Absence of crepitation (crepitation = perception identical to that of cutaneous emphysema Exclusion Criteria: * Allergy to ß lactam, fructose intolerance * Weight \< 40 kg or \> 105 kg * Use of oral antibiotic within 5 days (excluding one or two antibiotic intake ≤ 24 hours) * Erysipela/Cellulitis requiring hospitalization * Bilateral erysipela * Abscess * Lymphedema requiring permanent contention * Animal bite ≤ 7 days * HIV positive * Patient with comorbidity: known active hepatitis, chronic kidney failure or hepatocellular insufficiency * Patient unable to temporarily stop a long-term treatment as antibiotics or corticosteroids, o…