Temporal psychosis (temporal psychology)

Temporal psychosis is a condition that occurs when an individual crosses (or temporal hops) too many timelines in one lifetime, often resulting in destablisation of sanity as the alteration of the surrounding environment destablises.

Symptomology
There's no particular set of symptoms that would concretely verify temporal psychosis (as it can be easily confused with any other mental illness). One of the basic requirements should be demonstrability of actual temporal incohesion (EG time/space distortions).
 * Loss of concept of time (forwards, backwards and present).
 * Unfamiliarity with present series of events (IE remembers a different set of temporal events or history). (Unfamiliarity isn't symptom of temporal psychosis (just symptom of an individual experiencing a time-shift, loss of mental coherence coupled with this is.)
 * Sense of alienation from peer group and/or universe in general (EG the timeline doesn't seem like 'their' own, cannot understand why people don't remember their set of events).
 * Physical aging inconsistences of different parts of the body (hypothetical).
 * Loss of adaptability to new temporal environment.
 * Depression/sense of loss (of previous temporal acquiantances).

Treatment
Temporal psychosis is not treatable unless temporal distortions around the given individual are somehow prevented (treatment may be interrupted by a temporal shift). If a means of prevention of temporal distortion is found, the individual should be reintergrated into their new time/space environment, preferrably introduced to other individuals with time/space distortion experiences or a similar level of temporal psychosis, as the experiences will give a common ground and thus an 'anchor point' within that timeline.

The individual will feel alienated or out of place in the new timeline, which is normal, and can only be rectified if they are somehow returned. Given multi-universe theory, the probability of a correct return would be low if such a device could even be constructed. It would be better if the temporally displaced individual remained in a timeline where treatment and understanding were more readily available rather than risking a temporal hop to another timeline that may be more hostile or more alienating.

To prevent temporal contamination, the individual should be encouraged to generally stay out of any major events where possible (their distortion in the new timeline, either via interaction or appearance, may cause further time fragmentation and thus disruption). Total isolation is not recommended as support and stability is largely a requirement for recovery.

Causes
Temporal psychosis is a breakdown of cognitive functioning when an individual experiences too many temporal hops. Initially individuals can survive a couple of hops mentally intact (assuming the chains of temporal reality aren't too divergent from the individual's previous timeline), however they may notice odd inconsistencies in their new universe. This by itself won't usually cause temporal psychosis.

Temporal psychosis occurs as an individual starts to adapt to their new timeline environment, their environment gets changed by another temporal hop. As a result, all their previously formed in-world connections are lost, and so is their sense of association with other people, especially if memories are found to be of a differing nature (leading to conflicts and stigmatisation of the temporal hopping individual).

As a result, the temporal hop individual cannot explain their experiences to individuals who have not experienced temporal hops, and will be deemed either weird, crazy or insane by their peers, having remembered events that apparently did not occur. As a result, the individual begins to experience social isolation and the loss of social functioning due to isolation.

Prolonged periods of isolation, as noted, cause mental illness. In this case, the origin point of isolation is the multiple temporal hop event and thus alienation from formly known peers. Although the individual could form new contacts in the new timeline, multiple incursion events mean the associations do not last, and the individual may find themselves unwillingly isolated and unable to find individuals to speak to regarding the time/space events.

A multi universe hop will change past events, that make memories of the individual irrelevant in their present timeline, which will result in inconsistencies of reasoning, and a loss of a sense of an attachment to reality (as though the memories were false or the present timeline is somehow artificial).

If a temporal hop occurs within the same timestream (EG the same universe) but it's forwards and/or backwards in time, the individual's sense of position within that timeline will feel displaced (they will find their knowledge of either the past and/or future generally unrelateable to their peers who will be inclined not to believe them). Such individuals are unlikely to suffer temporal psychosis so long as temporal hops are reasonably linear within the same timeline and not erratic. Erratic timeline hops will merely result in temporal confusion.