This is probably one of your better bets and you’ll learn far more than Lemmy currently has to offer, unless one of those production people who have worked in the industry (like my former colleagues) ends up seeing this.
I know some general stuff, as my work involved having operational knowledge, but not enough to give advice that you’re looking for.
Is this a GP you talked to or dermatologist? I talked to about 4 different GPs/doctors over 2 years regarding spots which they all though were fungal infection before finally getting referral for dermatologist who was like nah it ain’t that, don’t waste time on steroid based cream and prescribed something else that worked.