Our expert says:
I am wondering whether it is a bit of thrush? I am aware that diabetics can be prone to thrush and the symptoms on his penis sound consistent with that. Have you tried an over the counter anti-fungal (e.g. medaspor, caneston) to see if it helps? You would both need to be treated if this is the case...If it doesn't, then I would suggest that perhaps you both go to your GP/medical sexual health professional to have another assessment.
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