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.
Physical illness. Paranoia is sometimes a symptom of certain physical illnesses, such as Huntingtonâs disease, Parkinsonâs disease, strokes, Alzheimerâs disease and other forms of dementia. Hearing loss can also trigger paranoid thoughts for some people.rugs such as cocaine, cannabis, alcohol, ecstasy, LSD and amphetamines can all trigger paranoia. Certain steroids taken by athletes and weightlifters can also lead to symptoms of paranoia. Some insecticides, fuel and paint have also been associated with paranoia.