Localized hair loss accompanied by dandruff in cats is commonly caused by fungal infections (such as ringworm), parasitic infections (such as mange mites), or dry, malnourished skin. In cases of fungal infection, circular patches of hair loss may appear with dandruff around the edges. A topical spray containing terbinafine is necessary; in severe cases, oral itraconazole may be required, and an Elizabethan collar should be used to prevent scratching. Parasitic infections require the use of a deworming medication containing doramectin, and a thorough cleaning of the environment is essential.
If a cat's skin problems are due to nutritional deficiencies, it needs supplementation with essential fatty acids, B vitamins, and high-quality protein, such as fish oil and lecithin. In addition, frequent bathing or using human shampoo can damage the skin barrier; it is recommended to bathe the cat no more than once a month and use pet-specific shampoo. If symptoms persist or worsen, seek veterinary attention promptly for a dermoscopy examination to determine the cause and receive appropriate treatment.
