coz..... its fun....
Yes you should be concerned. There should be a basking area with a temp around 90
If it is leaking fluid, call your vet.
Probably cancer...
Saftey of the area. then, if they're conscience. then, treatment.
You should be concerned. Because without it no life would be there on earth.
If this is a new thing for the dog, yes, you should be concerned.
Humans should be concerned about endangering all animals.
yes you should be concerned about mold on the skin. they are not natural flora.
Not necessarily. If you chronically have irritation in that area and continue to scratch, that can help spread the worms. If you are concerned, you should go see your doctor.
Yes, you should be concerned and have her evaluated by her doctor.
You should be concerned as it is not regular you will have to take extra care.
If your trimmer head is detached you should definitely be concerned, although this does not often happen.