Insensate foot of diabetic foot ulcer can have underlying silent neuropathic pain.

Subjects with diabetic foot ulcer (DFU) are believed to be less likely to complain of symptoms of painful diabetic peripheral neuropathy (PDPN). When we assessed this using Leeds Assessment of Neuropathic Symptoms and Signs questionnaire (s-LANSS) we found that out of total 44 subjects with DFU, 19 (43·2%) had possible neuropathic discomfort. s-LANSS score was significantly higher in DFU group (8·1 ± 7·7 versus 4·7 ± 4·6; P = 0·04). However, there was no difference in the perception of pain in 10-point Likert scale (3·9 ± 3·6 versus 3·3 ± 3·0; P = NS) between these two groups. This study suggests that subjects with DFU may suffer from PDPN, but do not perceive it. Further studies are needed to assess if treatment of PDPN in these subjects is beneficial.