"Thou art a boil; a plague-sore, an embossed carbuncle; in my corrupted blood" is in which Shakespearean play?

The line “Thou art a boil, a plague sore, an embossed carbuncle in my corrupted blood” is in "King Lear" (Act II, scene IV), a play written by William Shakespeare. These words according to literary experts and scholars have been said to mean, “You're a really mean/foul person”. It is a phrase that is seen and used as a true insult.

It is King Lear himself who says, “Thou art a boil; a plague-sore, an embossed carbuncle; in my corrupted blood” (Act II, scene IV, lines 256—258). The king is at this point treating his own flesh and blood (his daughters) as a disease. He is totally upset with them and their behavior.

Because of his daughters actions and statements, King Lear feels the need to leave the castle and go out into the storm. Rather than wait for his daughters to reject him one more time, he rejects them. In leaving, Lear attempts to seize some small control over his life.

The storm is seen as the perfect venue for Lear. Nature, which has established the natural order for king and father, has also made man a creature dependent on love for survival. The king's daughters, it appears, are unnatural in their lack of allegiance to their father; they who have rejected the bonds of blood and their social order. They have deprived Lear of the love and respect that he feels he deserves and that he expects. In his moment of despair, Lear has turned to nature for escape.