Throughout "Swell Up," the lyrics convey a sense of simmering anger and frustration, as the group members express their feelings about the injustices they see in their community. The chorus, which repeats the phrase "swell up," is a powerful expression of this emotion, capturing the feeling of being on the verge of boiling over.
The song's lyrics also touch on themes of social commentary, with the group addressing issues such as police brutality, poverty, and racism. These topics are handled with a level of candor and honesty that was rare in hip-hop at the time, making "Swell Up" a standout track in the genre.
"I'm on the mic, and I'm feelin' live Got my adrenaline pumpin', it's time to thrive I'm reppin' the Chi, where the streets is tough If you ain't from around here, you don't know enough"