"The Sick Rose" is a poem by William Blake, published in 1794. Some critics consider the song to be a very mysterious, comparing the words "rose" and "worm" with the characters of humanity. Some again, they suspect such a comparison, believing that the word "worm" is used as a symbol of human experience.
If we analyze the poem, we note that rose is on the bed, which implies the death of a rose. In this context, a worm can symbolize rot as a destructive element that leads to death.
The general impression is that the poet is desperate, while frantically describes it.
Word that best describes the tone of the poem is despair.