AHA/BHA: not every night

Chemical exfoliants on a schedule — side effects of daily acid use and a calmer plan for Indian heat.

Multi-week scheduleEvening onlyNot under 18

Default: not for under 18 without clinician guidance. Adults: start 1–2 nights weekly.

Updated 2026-04-12

AHA (like glycolic/lactic) and BHA (salicylic) can help texture and congestion. Using them every night — or stacking both with retinol — is a common way to injure the barrier, especially in hot, humid weather.

At a glance

Time: multi-week plan · Best time: evening · Age: not under 18 by default · SPF every morning on acid weeks.

Steps

Confirm your basic routine is calm: cleanse, moisturise, SPF.
Choose one acid product only. Patch-test first.
Use 1–2 evenings per week for two weeks. Buffer with moisturiser if sensitive (moisturiser first or mix — follow product label).
Do not use a second exfoliant, retinol, or strong vitamin C the same night.
Every morning: sunscreen. Acids can increase sun sensitivity.
If calm after two weeks, you may increase slowly — never jump to nightly + multi-acid stacks.

Side effects

Common: dryness, mild flaking, temporary purging-like bumps for some BHA users.
Overuse: tight shine, stinging water, cracked corners of nose/mouth, more redness.
Stop: severe burn, swelling, blistering, eye pain — wash off and seek care.

Watch

Teens: skip this category until a clinician says otherwise — use the under-18 first routine. This is general cosmetic education, not a medical diagnosis or prescription. Persistent rash, swelling, or eye involvement needs a qualified clinician.

Sources

AAD — chemical peels / exfoliation public education (professional care vs home use)Home leave-ons are milder than clinic peels but still need caution and sun protection

General education only — not a substitute for personal medical advice.