Try the ECG pads there are other pads that can be re-used that are larger and are not too bad to remove as the gell is not a glue it is water based. All you can really do is try.
You can also try a pain pen that just rest on where the pain is some people may use ECG conducting gell there to assist conductivity.
I don't know if this will help - it might actually be more trouble for you - but I had problems getting the pads to stick to non-hairy skin so I used to tape the pads on with surgical tape (which was cheap enough from supermarkets) and it did the job. Though I wouldn't fancy having to rip it off a load of hair - ouch!
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