Cats are prone to fleas if they are not properly fed and cared for. Fleas not only harm the cat's health, but are also detrimental to the owner and the family. To get rid of fleas on your cat, you must first learn how to determine if your cat has fleas and whether its skin disease is caused by fleas. Only by treating the symptoms can you ensure your cat's health. 
I. Methods to determine if a cat has fleas
1. You can tell if your cat has fleas by placing the "sheet" on a damp white towel and patting it.
2. When combing a cat with a fine-toothed comb, fleas may get stuck in the comb teeth.
3. If black granules appear where your cat sleeps, take one and place it on a tissue, add a drop of water. If the moistened area turns red, it indicates that it is the feces of a flea that has sucked the cat's blood.
4. If fleas are found in any of the above three situations, there may be 100 fleas in the surrounding area, and they need to be eliminated immediately.
II. How to treat fleas on cats
1. There are many flea-killing products on the market, varying in formula, killing speed, effectiveness, shelf life, and ease of use. If your cat is allergic to flea bites, use a fast-acting flea medication to prevent further flea bites.
2. Vacuuming frequently and immediately sealing and disposing of the vacuum cleaner bag can significantly reduce the chances of fleas maturing into adults in the house. All contaminated items, including the cat's bedding, should be thoroughly cleaned or disposed of.
3. Use long-acting flea medication on cats or other pets with fleas to kill adult fleas and prevent them from laying eggs.
4. House treatment to kill fleas at different stages. This step is more difficult because larvae may be deep in carpets and sofas. It can be time-consuming and expensive, as the entire house needs to be treated, including all crevices and corners. It's best to vacuum before applying medication to stimulate adult fleas to emerge from their cocoons. Follow the instructions for use of the medication to avoid poisoning.
5. Pay special attention to areas where your cat frequents, especially where it sleeps. Wash items thoroughly and dry them in the sun. Items that cannot be washed may be considered for disposal.
6. You can give all cats and dogs medication to inhibit fleas from becoming adults. However, these medications do not kill adult fleas. Follow all instructions carefully; some methods may take several months to completely eradicate fleas.
7. If all fleas, both adult and non-adult, have been eliminated, the flea control method needs to be changed. If your pet no longer goes outside, no further action is needed. Otherwise, you can choose a long-term flea control product. However, it should be used consistently, not intermittently.
8. Cat collars, sprays, shampoos (pet shampoo), powders, tablets, etc. Sprays, shampoos (pet shampoo), and powders have a short shelf life; if fleas are present in the cat's environment, the cat will quickly re-infest. Cat collars also have a limited shelf life and need to be replaced promptly. Some say that cat collars have limited flea-killing coverage, as fleas may infest areas other than the cat's neck. The quality of cat collars purchased domestically may vary greatly, so choose carefully (an article on a Chinese online forum mentions that the main ingredients of the medication should be one of the following: synergistic pyrethroids, pyrethroid insecticides, carbamates, organophosphates, or Aldosil).
There are many medications available to eliminate fleas on cats. Owners should be careful not to use multiple medications together, as this may cause discomfort to the cat. Furthermore, never use medication blindly, as this could lead to poisoning.
