Kellys model
In psychological terms, George Kelly considered hostility as the attempt to extort validating evidence from the environment to confirm types of social prediction, constructs, that have failed. Instead of reconstructing their constructs to meet disconfirmations with better predictions, the hostile person attempts to force or coerce the world to fit their view, even if this is a forlorn hope, and even if it entails emotional expenditure and/or harm to self or others.In this sense hostility is a form of psychological extortion - an attempt to force reality to produce the desired feedback, even by acting out in bullying by individuals and groups in various social contexts, in order that preconceptions become ever more widely validated. Kellys theory of cognitive hostility thus forms a parallel to Leon Festingers view that there is an inherent impulse to reduce cognitive dissonance.While challenging reality can be a useful part of life, and persistence in the face of failure can be a valuable trait (for instance in invention or discovery), in the case of hostility it is argued that evidence is not being accurately assessed but rather forced into a Procrustean mould in order to maintain ones belief systems and avoid having ones identity challenged. Instead it is claimed that hostility shows evidence of suppression or denial, and is "deleted" from awareness -  unfavorable evidence which might suggest that a prior belief is flawed is to various degrees ignored and willfully avoided.
Prognosis
Generally, PLE resolves without treatment; also, PLE irritations generally leave no scar.There may be a possible link with autoimmune thyroid disease. Some progression to autoimmune disease has been observed. However, another study of people with elevated titres of antinuclear antibodies with PLE found no progression to lupus erythematosus after an 8-year follow-up. Epidemiology
In the United States, whilst one-quarter of people being investigated for a photosensitivity disorder were diagnosed with PLE, the prevalence in the general population is 10 to 15% and may even be as high as 40% as suggested in one study of more than 2000 people. It is also particularly more prevalent in Central Europe and Scandinavia.PLE is more common in young adults and has a female preponderance with a ratio of 2:1 female-to-male. In Germany the female to male ratio has been cited as 9:1. It can, however, occur in all age groups and all skin types.Those experiencing sun exposure all year round seldom acquire PLE eruption. Hence, it is less common near the equator.The cases of this condition are most common between the spring and autumn months in the northern hemisphere and at higher altitudes. Society and culture
Reports of psychological distress have been made in more than 40% of peoples with PLE.