The cat may keep rubbing against people to leave its own scent to declare its sovereignty, or it may be acting coquettishly or expressing goodwill to the owner. Or it may be because there is something on the cat that makes it itchy, and it is just rubbing it. In this case, the pet owner can observe whether the cat frequently rubs against other things at home. If so, the cat can be taken to the hospital for examination to determine the cause of the itching, and then Treat according to the cause.