# Why does a retinoid routine need sunscreen?

Source: https://retinolroutine.com/retinol-sunscreen-next-day.html

Sun protection helps limit ultraviolet damage and matters when skin is irritated or sensitive. Follow the product label and your clinician’s directions.

## Keep the test simple

Change one thing at a time, follow the current label, and note timing and symptoms. That makes benefit or irritation easier to identify.

## When should you stop?

Stop for persistent burning, swelling, blistering, hives, or worsening symptoms. Seek urgent help for breathing trouble or severe swelling.

## Sources

1. [American Academy of Dermatology: Everyday care](https://www.aad.org/public/everyday-care)
2. [FDA: Cosmetics Labeling Guide](https://www.fda.gov/cosmetics/cosmetics-labeling-claims/cosmetics-labeling-guide)

*Reviewed September 22, 2026. General education, not diagnosis or personal medical advice.*