Healthy participants  Inclusion Criteria:  18-79 years old No chronic pain Able to provide consent  Exclusion Criteria:  Cardiovascular disease (arrhythmia, cerebrovascular accident, infarction...) Raynaud syndrome Severe psychiatric disease (dementia, schizophrenia, psychosis, major depression) Injuries or loss sensitivity to their forearms or hands Pregnant women or in post-partum period (<1 year)  Participants with chronic pain  Inclusion Criteria:  18-79 years old Chronic pain (chronic pain is defined by any regular pain for more than 6 months) Able to provide consent  Exclusion Criteria:  Cardiovascular disease (arrhythmia, cerebrovascular accident, infarction...) Raynaud syndrome Severe psychiatric disease (dementia, schizophrenia, psychosis, major depression) Injuries or loss sensitivity to their forearms or hands Pregnant women or in post-partum period (<1 year) Chronic pain caused by cancer or migraine