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.
It's not the anxiety itself that causes a rash, but the stress caused by anxiety. Stress puts your body in a state of extreme tension, and releases a great deal of cortisol and adrenaline into your blood stream-both of which are known to lead to skin reactions.tress also makes your skin more sensitive, so things that would not normally cause you to have a skin reaction (sunscreens, lotions, etc.) would create one on your skin. For reasons that are still not entirely clear, stress also causes skin conditions to get worse. If you have: 1  Psoriasis. 2  Eczema. 3  Acne. 4  Rosacea. 5  Herpes.