When using salicylic acid, there are a few signs that can indicate whether it is working effectively on your skin:

1. Reduced Breakouts: Salicylic acid is well-known for its ability to treat acne and breakouts. If you notice a reduction in the number and severity of your breakouts, it is a positive indication that salicylic acid is working for you.

2. Clearer Pores: Salicylic acid helps to unclog pores by exfoliating the skin and removing dead skin cells and excess oil. Over time, you should notice that your pores appear smaller and less congested.

3. Smoother Skin Texture: Salicylic acid promotes gentle exfoliation, which can lead to a smoother and more even skin texture. If you find that your skin feels smoother and looks more refined, it suggests that salicylic acid is doing its job.

4. Reduced Inflammation: Salicylic acid has anti-inflammatory properties, which can help calm redness and reduce inflammation associated with acne. If you notice a decrease in redness and irritation, it indicates that salicylic acid is working effectively.

5. Gradual Improvement: It's important to note that salicylic acid works gradually and may take some time to show significant results. Consistent use over several weeks or months is usually necessary to see the full benefits.

Remember, everyone's skin is unique, and individual results may vary. If you have any concerns or are unsure about the effectiveness of salicylic acid on your skin, it is always recommended to consult with a dermatologist or skincare professional for personalized advice.