The song "Under My Skin" by Guttermouth is a punk rock song characterized by its aggressive and rebellious tone. The lyrics convey a sense of frustration and annoyance towards someone who is constantly causing trouble and trying to manipulate the narrator. The song compares this person to needles and pins, implying that their presence is irritating and painful, much like an addiction. The individual is described as a "bad bad drug" that is trying to addict the narrator, but their attempts have failed. The lyrics also refer to this person as a "pea-brained monkey" who wants to inflict pain and play mind games. The narrator questions why this person is interested in them, as they have no desire for their presence. Despite the narrator's disinterest, this individual continues to hang around, causing annoyance and discomfort. The repetitive lines "You're under my skin like needles and pins" emphasize the strong impact and irritation that this person has on the narrator. They feel trapped and burdened by their presence. The second verse reinforces the metaphorical imagery of the person being under the narrator's skin, suggesting that their actions are infiltrating and affecting their thoughts and emotions. However, it is mentioned that while this person causes nightmares, they do not actually inflict physical pain. Overall, "Under My Skin" depicts a tense and antagonistic relationship where the narrator feels invaded and bothered by someone who refuses to leave them alone, causing frustration and annoyance. The song's lyrics serve as an expression of the narrator's discontent and refusal to be manipulated or controlled by this person.