Yeast (candida) is a normal part of the digestive Flora and, in a healty dog or person, is kept 'under control' by a strong proliferation of the beneficial bacteria. Your dog will have a yeast problem when the necessary bacteria is destroyed by outside factors, most frequently vaccination reactions. That same bacteria, when present in healthy amounts, also accounts for as much as 70% of immune function; therefore, its destruction can desimate much of immune system capabilities.
There are multiple underlying causes for dog skin sores including parasites (fleas, mites), poor grooming, dog skin infection (bacterial pyoderma, fungal), endocrine diseases, skin or hair follicle disorders disorders such as seborrhea, medication side effects (from corticosteroids) and allergy.
What causes painful rash? There are reasons why your skin rash is painful. It could be that the area of the skin where the rash appeared has been traumatized by frequent scratching or touching. If the skin itself or the underlying muscle has been torn, it could be the reason why your skin rash is painful.he painful rash will then burst, creating an open sore which will eventually heal, developing a protective crust. The problem here is that the virus that causes shingles can infect another person, particularly one who has not had a previous chickenpox infection or vaccination.