Inclusion Criteria:  Aged ≥ 18 years Intact healthy skin at the site of geko™ device application. Willing and able to give written informed consent Presence of an ulcerative wound to the lower leg Identified to receive geko™ therapy as part of their standard care for wound management.  Exclusion Criteria:  Pregnancy or breast feeding. Use of any other neuro-modulation device. Current use of TENS in the pelvic region, back or legs Trauma to the lower limbs that would prevent geko™ from stimulating the common peroneal nerve. No response to geko™ therapy i.e., no involuntary rhythmic upward and outward movement of the foot (dorsiflexion) at the maximum tolerable device setting