Eligibility Criteria:
Inclusion Criteria:
* \- Patient over 18 years of age and under 65 years of age,
* Male or female patient,
* Patient with fibromyalgia (according to the ACR criteria of 2016),
* Cooperation and understanding sufficient to comply with the requirements of the study,
* Acceptance of written consent,
* Affiliation to the French Social Security system.
Inclusion criteria healthy subjects:
* Subject of more than 18 years,
* Woman or man,
* Healthy voluntary non-painful subjects matched by age (+/- 5 years), by sex, by BMI (+/- 10%) and by menopausal status for women,
* Cooperation and understanding sufficient to comply with the requirements of the study,
* Acceptance of written consent,
* Affiliation to the French Social Security system,
* Registration or acceptance of registration in the National Register of Volunteers participating in research.
Exclusion Criteria:
* Exclusion criteria patients:
* Patient with a physical inability to place the palms of the hands or the soles of the feet on the electrodes of Sudoscan®,
* Patient with a medical and / or surgical history judged by the investigator or his representative to be incompatible with the test (in particular a disease known to give neuropathies of small fibers: diabetes, Gougerot-Sjögren's disease, vasculitis, sarcoidosis, chronic ethylism ...),
* Pregnant or nursing woman
* Patient participating in another clinical trial, or in a period of exclusion, or having received a total amount of compensation in excess of EUR 4500 over the 12 months preceding the start of the trial,
* Patient benefiting from a measure of legal protection (curatorship, guardianship, safeguard of justice ...),
* Patient not affiliated to the French Social Security system.
Exclusion criteria healthy subjects :
* Physical inability to place the palms of the hands or the soles of the feet on the electrodes of Sudoscan®.
* Medical and / or surgical history judged by the investigator or his representative to be incompatible with the test,
* Pregnant or nursing woman
* Participating in another clinical trial, or within the exclusion period, or having received a total amount of compensation in excess of EUR 4500 over the 12 months preceding the start of the trial,
* Cooperation and an understanding that does not permit strict compliance with the conditions laid down in the Protocol,
* Benefiting from a measure of legal protection (curatorship, guardianship, safeguard of justice ...),
* Not affiliated to the French Social Security system.