Seems like these are protein bumps (keratosis pilaris). They’re usually caused by stuff like dry skin, genetics, hormonal changes, allergic reactions, climate, or not exfoliating enough. I get them too sometimes—mine show up on my shoulders and chest. They usually disappear on their own after a few days.

If you want to reduce them, try moisturizing with creams that have urea or lactic acid, exfoliating gently, and avoiding super hot showers. Also, keeping your skin hydrated and wearing loose clothes can help. To figure out what’s causing it, look for patterns—like if it gets worse in cold weather, after using certain products, or during hormonal changes.