shockwave would not (in my view) be absolutely contraindicated BUT I would certainly be proceeding with caution - there is a risk of being about tissue damage (as opposed to tissue stimulation) under these circumstances. The shockwave will have a strong 'pro-inflammatory' effect - and if the local vascularity is not able to deliver the response (due to the Type2 DM) then there is the potential for an adverse response. The diminished sensation is OK - though not ideal. If all sensation was absent, then I would not be going there. Diminished - OK with caution. If this were a patient of mine, then I might be thinking of trying other options in preference - though of course, appreciate that you may have already done so???