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.
Some health problems that may be caused by stress. 1  diarrhea. 2  nausea. 3  indigestion. 4  sphincter of Oddi spasms. 5  spastic colon. 6  irritable bowel syndrome. 7  constipation. 8  colds and sinus infections. 9  vaginal yeast infection. 10  bladder infections. 11  fiber myalgia. 12  arthritis. 13  high blood pressure. 14  heart disease. 15  hyperventilation. 16  asthma. 17  headaches. 18  migraines.