Thyroid disease in cats is linked to heart disease and a fast heartbeat in conjunction with any other symptoms of thyroid problems is cause for a trip to the vet. Once the hyperthyroidism is treated, your cat's heart rate should return to normal.
Stress reaction â some studies have found that paranoia is more common in people who have experienced severe and ongoing stress â for example, prisoners of war. How stress can trigger paranoia is unclear.
Stress comes from the pressures we feel in life, as we are pushed by work or any other task that puts undue pressure on our minds and body, adrenaline is released, extended stay of the hormone causes depression, a rise in the blood pressure and other negative changes and effects.