A Histiocytoma is a growth that develops on the surface of a dog's skin. Histiocytomas are benign, non-cancerous nodules, commonly known as round cell tumors.

Ear mites are a common parasite found in the ear canal of cats. These microscopic creatures live on the surface of the skin, feeding on skin oil and ear wax.

Girth galls in horses are skin sores that develop due to the friction between the girth (or harness) and the horse. Galls are also named girth blisters.

Also, knowns as shell rot, ulcerative shell disease in turtles is an infection of the skin or shell either by bacteria or fungal organisms.

Have a look at the base of your cat’s tail. Is it greasy? If so, your cat might have stud tail. It’s an issue with their sebaceous glands, which are near the base of the tail and produce oil or wax to keep your cat’s fur soft and healthy. With stud tail in cats, these glands are overactive, producing so much oil that it builds up on the fur. Stud tail is often a hormonal issue in non-neutered cats, but it can occur in every cat.

Actinomycosis is a type of bacterial infection caused by a variety of Actinomyces species bacteria.

Swollen toes (paw pads) are rare in cats, but may be a symptom of significant underlying disease

A flea allergy, or flea allergy dermatitis, is an inflammatory response to flea bites,

Fleas are parasitic insects: they live on the skin and eat the blood of their hosts.

Flea allergy dermatitis (FAD) is a skin disease that results when a cat develops an allergy to flea saliva. The body treats the allergen as a harmful substance and reacts disproportionately.

The sensation of itchiness (pruritus) in a cat can be caused by many things, most often fungal infections (ringworm), parasites (like fleas or mites), and allergies (to food, fleas, or airborne particles). 

Itchy skin, or pruritus, is a common symptom of multiple conditions. Scratching, rubbing, licking, and chewing are the most common signs shown by itchy dogs.

Atopic dermatitis (or atopy) is a common allergic condition in dogs that is similar to human environmental allergies (hayfever). Determining what the dog is allergic to is rarely necessary for management of the disease, but examples of common dog allergens include pollen, dust mites, and mold spores. 

A moist, inflamed, red, weepy, clearly defined spot on a dog’s skin is often referred to as a hot spot.

Contact dermatitis refers to inflammation of the skin in response to an allergen or irritant making physical contact with a dog’s skin cells.

Feline pododermatitis (also known as plasma cell pododermatitis, or PCP) is a rare disease that causes inflammation of the paw pads.

A dog may obsessively lick and chew themselves, objects in their environment, or towards nothing in midair.

Seasonal allergies are a common condition in dogs. Most seasonal allergy symptoms in dogs result from exposure to flea saliva and/or pollen.

Canine allergies are common and occur when the immune system overreacts to allergens the dog is exposed to.

Subcutaneous lumps are found under the skin, rather than within the skin or at the surface of the skin. If a lump does not create a visible mark or disruption on the skin, doesn’t arise from the bone, and the skin moves freely over it, it is a subcutaneous lump.

Feline Solar Dermatitis is a serious skin disorder that occurs in cats with thin hair or short, white hair.

Lymphadenopathy is enlargement of the lymph nodes, and is a common finding in many diseases, illnesses, and conditions.

Lymphadenopathy, or enlarged lymph nodes, is swelling of the lymph nodes due to infection, inflammation, or the presence of tumor cells in the nodes.

Whereas humans get sneezy and sniffly at certain times of the year, some cats get red, itchy skin and secondary skin infections for the same reason: seasonal allergies.

Cutaneous lumps are lumps within a dog’s skin which make a nodule, raised area, or discoloration on the surface of the skin.

Skin lumps occurring within or near the surface of the skin are called cutaneous masses.

Bacterial cellulitis in horses is a dangerous infection and inflammation of the tissues beneath the skin. Bacterial cellulitis is an emergency that requires immediate veterinary attention

Ear mites (Otodectes cynotis) are a contagious parasite that live in the ears of their hosts. This parasite resembles a small tick, but is much smaller; too small to distinguish with the naked eye.

If a dog tilts his head involuntarily or chronically, especially when along with other symptoms like ear pain or lack of balance, it may be a symptom of an underlying medical condition

Food allergies are a reaction of the immune system to specific proteins within the diet.