Is fear simply a negative phenomenon?
No, it also warns us in dangerous situations and protects us against getting hurt due to inadequate behaviour.
If, however, fear dominates our perception and lasts in a dysfunctional way, this may lead serious damage of our physiological system. Extreme or prolonged reactions of fear can heavily restrict human beings. Furthermore, it can result in heart racing, breathlessness, dizziness, fits of cold sweat, or trembling.