Topical Aluminium Chloride vs OnabotulinumtoxinA Intradermal Injections in Residual Limb Hyperhidrosis (Lower Limbs)

Inclusion Criteria: * Lower limb amputees suffering from residual limb hyperhidrosis with important cutaneous, functional, social and professional consequences, whatever the amputation cause * HDSS ≥ 2 (Hyperhidrosis Disease Severity Score) * Men and women * 18 to 75 years old * Written informed consent * No exclusion criteria * Social assurance Exclusion Criteria: * Botulinum toxin injection necessity for another disease * Evolutive Central neurologic disease or myasthenia. * Egg or albumine allergy * Botulinum toxin or other excipients hypersensibility * Legally protected Adults and people unable to give an informed consent. (article L-1121-8 from Public Health Code), people without freedom and people hospitalized without consent (article L-1121-6 from Public Health Code) * Pregnant women or giving breast women (article L-1121-5 from Public Health) * Patient refusing participating * Previous hyperhidrosis treatment with aluminium chloride in the last 4 weeks * Previous hyperhidrosis treatment with botulinum toxin in the last 2 years * Other ongoing hyperhidrosis treatment * Large residual limb eczematiform lesions: corticoids treatment (for example: Locapred® 1 application per day during 1 week then decrease). * Aminoglycoside ongoing treatment