Broken skin on a cat’s nose is mostly caused by trauma. For example, the cat accidentally scratches the nose, or is scratched when fighting with other cats. It may also be caused by rubbing against an object, but it is not ruled out that it is caused by fungal or bacterial infection. Skin disease, so it is best for the owner to check whether there are redness, swelling, dandruff, suppuration, hair loss, etc. on other parts of the cat’s skin. If so, then most likely the cat is suffering from skin disease, and then targeted measures are needed. of treatment.