Help please. Burn odor??? Is it normal???

My son is 2 years old and suffered partial 2nd degree burns on 20% of his body 6 days ago. He was treated with debridement, a silver foam/compression dressing. The doctor stated that the foam is good in place for 7 days and just to change out the compression gauze. I have been doing what is ordered and everything seems to be progressing smoothly, but he has an odd smell coming from the areas. Not foul, but if you are close to him you can smell it. Kind of like a copper/sweaty/stale smell. Is this normal? The drainage is of normal color. We did speak to the physician who did the debreidment and is over looking his care on the phone, he says my son has no indicators of infection. He has an appointment tomorrow to assess what Should be done as far as further debridement. Anyway, I was wondering if a smell can come from burns just as a healing process? How can I wash his hair if he has burns on his neck and close to his ear? I'm so lost as to how to deal with this, he's my son and this is the first time he has even been ill in any way. Can anyone help me out here? Tweet