"I have Pluto in transit opposing or squaring Sun in the birth chart. What is involved ?" What can it mean to have bad form Pluto aspects such as quadrature and opposition with our natal Sun ? What a way to give an unfavorable passage of Pluto on the planet Sun in our birth chart ? What does it mean to have the planet Pluto square or opposed natal Sun ? The transit of Pluto quadrature and opposition to natal Sun which carries positive connotations for us ? Which are meaning, significance, sense of the planet Pluto in transit in square or opposition at the birth Sun ? Having this planet in bad aspect and then square (90 degrees) or that form an opposition (180 degrees) with the planet Sun can bring important significance not only on a personal level. Let's say, however, that not take into consideration the position of Sun in the 12 astrological houses and then Pluto transiting Sun which is in I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII house. This is because Pluto is a generational planet, and therefore its influence rather than on the individual and therefore on its areas of life takes place and acts on an entire generation, an entire community.
Meaning : problems possibly related to sexual and possible mental disorders. You should definitely avoid thinking negatively concepts such as life and death and you have to stay away from people who might understand that you are worried, in trouble and take advantage of you. Do not approach the occult absolutely unscrupulous operators and avoid sitting by psychologists that may delve into your subconscious pulling out things that might scare you a lot.