Imposter's syndrome is the fear of being found out as a fraud, and this short poem turns that fear into something almost physical. The speaker is at a conference, presenting a paper, and feels they have fooled the room. Someone in the audience raises a hand, but the hand is "blind," which suggests a question asked without real insight, or a person who can't see through the act. Still, the speaker feels exposed.
The image of the tick is the sharpest part. A tick swells as it feeds, and the hand rises "like a tick" to see "how simply I bleed." The speaker seems to imagine the questioner as a parasite, hungry for a weak spot. The word "simply" is telling: the speaker expects to fall apart easily, with no real defense. The mood is tense and uneasy, with a touch of dark humor. In just a few lines, the poem captures how a single raised hand can feel like an attack when you already doubt yourself.