Hot spots (acute moist dermatitis) are seen more frequently in dogs than cats. These lesions are due to self inflicted trauma (licking, scratching, biting) that is set off by a skin irritant. Causes of irritation include fleas, allergies, insect and tick bites, skin infections and grooming complications. Typically, the lesions are moist, red, very tender and itchy, and have a foul odor. Hair loss may or may not be present and often the extent of the lesion is not seen if the pet has a thick hair coat. Lesions can be in multiple areas and grow rapidly in size. Treatment includes stopping the irritation and itching, controlling infection and removing the inciting cause when possible. For initial home care clean the area with tepid water and a mild veterinary approved solution and prevent the animal from scratching or chewing at the area. Cool compresses may temporarily relieve the irritation but usually an oral or topical mediation prescribed by your veterinarian is needed. Drying agents as well as antibiotics may be recommended by your veterinarian.