A cat's claws may open and close because they are bored, playing, or injured. Generally, cats will behave this way during fights so that they can launch attacks at any time. Sometimes injured cats will open and close their claws to relieve pain. Owners After discovering the wound, you should pay attention to the condition of the cat's wound, gently wipe it with iodophor for disinfection, and then take the cat to the pet hospital for examination and treatment to avoid other physical problems.