Non-pharmacological treatments for pain relief are more and more used in clinical care although any scientific validation. Among the non-pharmacological treatments of neuropathic pain relief, TENS (Electrical Nerve Stimulation Therapy) is the major treatment with the best benefit. Unfortunately, the use of TENS by patients appears very difficult. Because of this inconvenience, more than 40% of TENS users interrupt the treatment despite treatment benefit. A new TENS device: actiTENS that seems to be less constraining than TENS is now available in France. ActiTENS efficacy and safety compared to TENS need to be investigated.

The main objective is to evaluate and to compare the use of actiTENS, with TENS Eco 2, the classical device in patients with chronic neuropathic pain.

Inclusion Criteria:

• Adult
• Patient covered by national health insurance
• Patient able to express consent
• Patient with neuropathic pain with DN4 (Douleur Neuropathique 4 Questions) > or = 4/10.
• Actual or potential neurologic lesion
• Patient still using a TENS device

Exclusion Criteria:

• Planned surgery in the next two months
• Modification of the reatment in the next two motnhs
• Other study ongoing for the patient
• Medical contraindication for TENS