What ingredient should I look for to treat keratosis pilaris (KP) bumps?

The consensus across r/SkincareAddiction KP threads points to alpha hydroxy acids — specifically lactic acid (AmLactin's 12% formula is the most-cited) or glycolic acid — and urea-based lotions. Results typically take a few weeks of consistent twice-daily use, and reviewers note these formulas can sting briefly on freshly shaved or broken skin.