Skin problems can also present a challenging diagnostic problem for the veterinarian. Symptoms of skin problems include loss of hair. But they don't stop at just making your cat look bad. They also can lead to more serious problems such as infection, behavioral changes due to stress, and seemingly endless scratching. The cause can be something as simple as a flea infestation, but can also be caused by a number of other things.
Cats can react severely to flea bites and airborne allergens.
Just like you, your cat can also be allergic to many chemicals and other things with which she comes into contact. Cats may also have allergies to certain foods or medications. Internal parasites are yet another on this long list of allergy causing suspects. These microbes can cause rashes, sores and a variety other skin lesions. Ectoparasites are a bit larger and live on or visit your cat, causing big problems.