All personality types or traits are part of the varied nature of human beings, and while egotism can be annoying it also acts as a driver. Pathologising such traits can be a terrible mistake.
In our society, to the general public ego is regarded as the extent to which one thinks highly of one's self but in psychology, ego is very similar to what is meant by the term identity, and ego functioning refers to the components of the self-consciousness system that relate directly to mental health. The self-consciousness system is the narrating portion of human consciousness that reflects on one’s thoughts, feelings and actions and inhibits or legitimizes them to one’s self and to others.
not a serious psychological illness . it can be a motivating factor for altruistic tasks. self-love can guide us to develop in different aspects of life .
The underlying subjective nature of much 'scientific' psychological understandings is neither scientific nor genuinely psychological. Rarely are these views subjected to genuine scientific rigour but exist as propositions or hypothesis that then become popular in the public mind as scientific fact. Few psychological facts would pass scientific scrutiny but are nonetheless used to drive health industries.
Egoism is not a illness, it is an attitude. Do not confit. God gives permission to the sick person to pray, for example, in their bed. But the ego person does not have permission he will be punished by his attitude and his handling of other people.
Egoism and self love, if not harming and interfering with others' lives, and it is limited to person's own set of mind and life; then it can not be considered as psychological illness, it could be someone's way of life.
Yes, ego is a force that at times seems separate from individual identity. It goes outward, whereas self-love is inward. Ego can produce results, but self-love appears to produce none.
Psychological egoism is the view that humans are always motivated by self-interest, even in what seem to be acts of altruism. It claims that, when people choose to help others, they do so ultimately because of the personal benefits that they themselves expect to obtain, directly or indirectly, from doing so. This is a descriptive rather than normative view, since it only makes claims about how things are, not how they ought to be. It is, however, related to several other normative forms of egoism, such as ethical egoism and rational egoism.
A specific form of psychological egoism is psychological hedonism, the view that the ultimate motive for all voluntary human action is the desire to experience pleasure or to avoid pain. Many discussions of psychological egoism focus on this type, but the two are not the same: theorists have explained behavior motivated by self-interest without using pleasure and pain as the final causes of behavior. Psychological hedonism argues actions are caused by both a need for pleasure immediately and in the future. However, immediate gratification can be sacrificed for a chance of greater, future pleasure. Further, humans are not motivated to strictly avoid pain and only pursue pleasure, but, instead, humans will endure pain to achieve the greatest net pleasure. Accordingly, all actions are tools for increasing pleasure or decreasing pain, even those defined as altruistic and those that do not cause an immediate change in satisfaction levels.
If you want a philosophical answer within a religious context (although you can bracket off the religious content without much loss), I suggest Joseph Butler, Five Sermons (Hackett Classics) or Human Nature and Other Sermons (Project Gutenburg, Etext #3150, especially Sermons I-III and XI ).
Bishop Butler famously argued that our problem was not that we loved ourselves too much, but that we didn't love ourselves enough, often engaging in harmful self-indulgence and short-term gratification at the expense of long-term goals that are more conducive to happiness.
I do not believe that self-love is a serious illness. Rather, everyone should have self-esteem, know how to take care of themselves and learn to self-govern. A person to be critical of the situations he faces must have self-esteem, which I think is related to self-confidence and determination to action. For its part, selfishness if it were excessive the environment itself would be responsible for controlling. In this case I recommend reading the passions in Hume and the Scottish philosophy, can be helpful at this point.
Focusing on oneself is not bad in my opinion. One cannot just live his/her life as per what the society thinks or presumes them to do and don't.
So, no, I don't think self-love can be termed as a psychological illness.
Coming to the "Egoism" point, ones ego is simple Self-pride. Being appreciative about oneself is fine, but, inflicting a sense of negativity and pessimism in others is surely not good.
I would like to put the crux of my answer by quoting an adage instead: