Choosing the right blush stick shade for your skin tone involves understanding your skin's undertones and the color wheel. Here's a step-by-step guide:

1. Determine Your Skin's Undertone: The first step is to understand your skin's undertone, which can be cool, warm, or neutral. Cool undertones have a pink, red, or bluish tint, while warm undertones appear yellow, peachy, or golden. Neutral is a mix of cool and warm. One way to determine your undertone is by looking at the veins on your wrist. If they appear blue or purple, you likely have cool undertones. If they appear green, you have warm undertones. If it's hard to tell, you likely have neutral undertones.

2. Understand the Color Wheel: The color wheel is a helpful tool in selecting the right blush color. Colors opposite each other on the wheel are complementary and will enhance each other. For instance, if you have a cool undertone, a blush with a warm hue like peach or coral will complement your skin tone. If you have a warm undertone, a cooler blush color like rose or mauve will look best.

3. Test the Blush: It's always a good idea to test the blush on your skin before purchasing. The back of your hand is a good place to start, but the cheek is the most accurate spot. The color should blend smoothly and enhance your complexion, not overpower it.

4. Consider Your Skin Type: If you have oily skin, a matte blush stick might be a better option, while those with dry skin might prefer a creamier, more hydrating formula.

5. Consider Your Makeup Look: If you're going for a natural look, choose a blush that closely matches your skin tone when flushed. For a more dramatic look, opt for a deeper or brighter shade.

Remember, the goal is to enhance your natural beauty and create a healthy, youthful glow. Don't be afraid to experiment with different shades until you find the one that works best for you.