my mum suffered a while back with a reacurring leg ulcer and against docs and nurses advice to keep the same dressing on until she had her next appoinment ,she would regularly change the dressing and let some air get to it[it was a bad one also

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i know they say an ulcer heels better with the same dressing but my theory is how can it if its festering..lets face it if we have a plaster thats gone ganky we change it.........
i am not advising you to do it as you know your on body but if you do expose iot beware of flys as their acid will sting like mad

if they want a feed