What should you know about glycolic lactic acid?

Glycolic acid has a small molecular structure and is commonly chosen for surface exfoliation and uneven texture. Lactic acid also exfoliates and can feel more conditioning in some formulations. The actual strength, acidity, vehicle, and time on the skin affect the experience more than the ingredient name alone.

Either acid may cause tingling, dryness, redness, or flaking. These effects are more concerning when they intensify, persist, or appear with swelling or blistering. A product’s suitability also depends on the skin barrier and what else is used in the routine.

Introduce one exfoliating product at a time and follow its label or clinician’s instructions. Do not apply it to broken, sunburned, infected, or actively inflamed skin. Moisturise regularly, avoid scrubbing, and use sun protection because freshly exfoliated skin can be more reactive to sunlight. Pause the acid if burning or pronounced redness develops, and let the barrier recover before considering another application.

Ask a clinician to assess severe burning, facial swelling, blisters, open areas, pus, or a rash that continues to spread. Prompt review is also sensible if repeated use causes persistent darkening or light patches. Breathing difficulty or swelling of the lips and tongue needs urgent medical attention.

Discuss which acid fits your goal, how often it should be used, and whether your current retinoid or acne treatment should be paused. Ask what symptoms mean the barrier is irritated and what moisturiser or cleanser is appropriate during recovery.