 Though you might enjoy the sudden attention, it could indicate a problem. They may need extra warmth, care, and attention for a medical reason. Distress can often make them realize that you are the one who loves them the most and can help them. Cats suddenly become more affectionate due to anxiety. Your cat may feel insecure about a new person in the home, such as a baby or partner. A loud noise may have spooked your cat, or it may be sick and feel afraid. Cats and cats and heat are clingy due to fluctuating hormones.