Foam is an efficient thermal insulator, so the temperature of the oil can become difficult to control. The presence of air bubbles in the fluid can lead to excessive oxidation, cavitation, the reduction of lubricating properties of the oil and hydraulic system failure. Causes The causes of foaming are many. The most common include: Water contamination
Psychosis refers to an abnormal condition of the mind described as involving a loss of contact with reality. People with psychosis are described as psychotic. People experiencing psychosis may exhibit some personality changes and thought disorder.
Psychosis is a symptom of psychiatric illness; it is not itself the name of a mental disorder. 4. Psychosis means experiencing things and believing them to be real when they are not; in other words, losing contact with reality. This happens in two broad forms: 1-4. 1  Hallucination-hearing, seeing or feeling things that are not there. 2  Delusion-holding unusual beliefs not shared by other people.