I'm sure there are a number of possibilities, but the two that immediately spring to mind are ringworm and impetigo.
For your sake I seriously hope it's not impetigo, as it is a highly contagious and truly disgusting disease. Despite the name, ringworm is not a parasitic worm, but a fungal infection.
impetigo
Could be ringworm, a fungal infection in which the 'sores' are a rash in the form of a circle, red inside, and whitish-grey around the ring. Some people have said that ringworm sores look like cigarette burns.
Sores on the back and neck that resemble cigarette burns may be caused by skin conditions such as contact dermatitis (from an irritant or allergen), folliculitis (infection of hair follicles), or herpes simplex (viral infection). It's important to see a healthcare provider for proper diagnosis and treatment, as these conditions may require different approaches for management.
Did you have an outdoor job? Have you spent a lot of time in the sun? If so, you had better see a doctor about those painful sores so he can rule out melanoma.
it is probably herpes...you should get it checked out
Friction burns/marks/sores caused by the nipples being rubbed by cloth of the material being wornm over them (Like a t shirt etc.)
Soap irritation, yeast infection, or possibly, inherited herpes
Possible causes of sores behind a cat's ears may include allergies, ear mites, bacterial or fungal infections, trauma, or skin conditions like dermatitis. It is important to consult a veterinarian for proper diagnosis and treatment.
You can take the chance if you like, but to be safe, don't do it. The virus that causes cold sores is very contagious when the sores are in evidence and for a period before they show. Best bet is to be cautious and don't chance spreading this painful affliction any more than you have to.
Cold sores look like a blister.
the real cause of heart burn is acid in the tummy and burns like the mad
Sounds like a flea bed spot bathe her with flea shampoo and treat with neosporin if she can`t reach to lick it off