Providing extra attention and distraction are the easiest ways to help a cat in heat, according to The Nest. Petting her and playing with her are two ways to accomplish this.
It is also helpful to prevent the cat from coming into any contact with male cats by keeping her inside with windows and doors securely shut, advises The Nest. Catnip can help if the cat finds it calming. Catnip often has the opposite effect, so it is important to know how the cat reacts.
If these tips don't work, a veterinarian may prescribe hormonal medicine to lessen the symptoms, notes The Nest. The most effective way to prevent the cat from going into heat in the future is to spay her.