Years ago I woke up sweating at night, lost weight, went to doctor, tested for aids, this and that, wife said to doctor could it be his in grown toenail causing all this, doc said we will worry about that later, sure enough it was my toenail causing a infection.  Listen to the patient.  The body has not changed since the beginning of time, everybody has the same parts,  they should be good at what they do. ( well we are larger   John Deere tech has to work on everything from the drawbar to the front of hood, no picking and choosing. doctor can pawn you off to another so called specialist.