Using a bronzer stick for acne-prone skin can be a great way to add warmth and dimension to your complexion, but it's important to do it correctly to avoid exacerbating any existing skin issues. Here's a step-by-step guide:

1. Start with Clean Skin: Always start with a clean, moisturized face. This helps to ensure that your makeup goes on smoothly and doesn't clog your pores.

2. Apply a Primer: A primer can help to create a barrier between your skin and your makeup, preventing clogging of pores. Look for a primer that is non-comedogenic and is designed for acne-prone skin.

3. Use a Foundation: Apply a foundation that matches your skin tone and is suitable for acne-prone skin. This will help to create a smooth, even base for your bronzer.

4. Apply the Bronzer Stick: Swipe the bronzer stick lightly on the areas of your face where the sun would naturally hit - the top of your forehead, the bridge of your nose, and the tops of your cheekbones. You can also apply it along your jawline for a more sculpted look.

5. Blend: Use a makeup brush or sponge to blend the bronzer into your skin. Make sure to blend well to avoid any harsh lines or patches.

6. Set Your Makeup: Use a setting powder or spray to help your makeup stay in place and avoid smudging or fading throughout the day.

Remember, when choosing a bronzer stick, look for one that is labeled non-comedogenic, meaning it won't clog your pores. Also, it's worth investing in a product that is free from harsh chemicals and fragrances, as these can irritate acne-prone skin.

Lastly, always remove your makeup at the end of the day to prevent breakouts and keep your skin healthy.