There are hard bumps under the armpits of the cat's forelimbs. The owner should carefully check whether it is an injury or contaminated with dirt. If not, the cat may have tinea felis. Owners should pay attention to the cleanliness of the cat's skin, comb the cat's hair, and feed the cat some fish, beef, goat milk powder and other foods to supplement the cat's nutrition and promote the cat's physical recovery.