In class we mentioned that the poem "Harlem" was written about the Harlem renaissance. The first line says "what happens to dreams deferred". When you read the rest of Langstons poem he talks about festering wounds which was common back then but it gives you a nasty image in your head. Langston is comparing this festering wound to a dream defferred. It constantly eats at you and bothers you to have a dream crushed.