Hi, first time posting and I hope I'm doing this right. I rescued my boy about 3 years ago now and we've gone from fleas and ringworm to crystals and being blocked. Recently I found a spot under his chin that looked like he scratched himself. Every night I cleaned it and put some ointment on. Seems to be scabbing up and getting better. Today I noticed he has a spot of dark, scaly material between his shoulders. Both spots do not bother him enough to be disgruntled when I touch or hover over them. If I did this right, I've attached pictures (first day of scratch, scratch today, patch). I'm struggling with his last $3k vet bill so any answers I can find here are gonna save us big time. Thank you.