My friend recently dropped some meth on him and the next day his belly started having grey and green fuzz constantly in it, and there is a large bump in his belly button along with red and irritated skin and it hurts at the slightest movement. My question is can it be meth that he,didn t find and it got,left in contact with his belly button until it melted? And if so what can happen if it doesn t heal it self like a normal burn to the skin?