Exfoliating acids are the quiet workhorses of a good routine. Used well, they keep pores clear, smooth rough texture and help dull, uneven skin look brighter. Used badly, they leave skin raw, stinging and more sensitive to Pakistan's strong sun. The secret is matching the acid to your skin, not chasing the highest percentage.
This guide explains how AHA, BHA and PHA differ, how salicylic acid fits into cleansers, serums and creams, how to start safely in hot, humid weather, and which mistakes to avoid.
What are AHA, BHA and PHA exfoliants?
All three are chemical exfoliants: instead of scrubbing, they loosen the bonds that hold dead skin cells together so they shed evenly. The difference is where they work and how strong they feel.
AHA (alpha hydroxy acids)
Glycolic, lactic and mandelic acid are water-soluble and work on the surface of the skin. They are the go-to for dullness, rough patches and uneven-looking tone. Glycolic acid has the smallest molecule, so it acts fastest and can also sting the most.
BHA (beta hydroxy acid)
Salicylic acid is the BHA you will see on most labels. It is oil-soluble, which lets it travel into the pore lining and loosen the mix of oil and dead cells that turns into blackheads and breakouts. That is why it is the favourite for oily, congested and acne-prone skin.
PHA (polyhydroxy acids)
Gluconolactone and lactobionic acid have a large molecule, so they work slowly near the surface and rarely sting. PHAs suit sensitive or dry skin and anyone who wants a gentle daily glow rather than a strong peel.
| Acid | Works on | Best for | Feel |
|---|---|---|---|
| AHA (glycolic, lactic) | Skin surface | Dullness, rough texture, uneven tone | Can tingle |
| BHA (salicylic acid) | Inside the pore | Oily skin, blackheads, breakouts | Mild, slightly drying |
| PHA (gluconolactone) | Surface, slowly | Sensitive or dry skin, gentle glow | Very gentle |
Which exfoliant is right for your skin type?
Oily and acne-prone skin
Start with salicylic acid. A BHA cleanser or toner two to four times a week is usually enough to keep pores clearer, and many oily skin types eventually use it daily. Browse the full salicylic acid and BHA edit if this is you.
Dry or dull skin
A lactic acid or a low-strength glycolic product used once or twice a week helps flaky, tired-looking skin look smoother. Follow with a rich moisturiser, especially in winter.
Sensitive or reactive skin
PHA is the friendliest starting point. If your skin reddens easily, begin with a blended toner such as the SOME BY MI AHA.BHA.PHA 30 Days Miracle Toner, which combines all three acid families at gentle levels, and use it on alternate nights.
Combination skin
Use BHA on the T-zone and a gentle AHA or PHA on drier cheeks, or alternate nights. You do not need one acid for your whole face.
Salicylic acid explained: cleanser, serum or cream?
Salicylic acid comes in three main formats, and the right one depends on how much contact time your skin can handle.
Salicylic acid face wash and cleanser
A salicylic acid cleanser is the gentlest way in: it touches the skin for under a minute, so irritation is unlikely. Massage it over damp skin for 30 to 60 seconds before rinsing so the acid has time to work. The COSRX Salicylic Acid Daily Gentle Cleanser and the CeraVe SA Smoothing Cleanser are two easy starting points, and the SOME BY MI AHA BHA PHA 30 Days Miracle Foam Cleanser adds AHA and PHA for extra smoothness. Look for SLS-free cleansers: a sulphate-free base cleans without stripping, which matters when the acid is already working on oil.
Salicylic acid serum
Leave-on serums give the acid more time on the skin, so they are better for stubborn blackheads and clogged texture. Apply a few drops to dry skin at night, wait a minute, then moisturise. The SOME BY MI AHA BHA PHA 30 Days Miracle Serum is a blended option for people who want BHA with some surface exfoliation.
Salicylic acid cream
Creams and gel-creams with salicylic acid are best for oily skin that wants exfoliation and moisture in one step. They suit hot, humid days when layering feels heavy.
How to apply salicylic acid and other acids
The way you introduce an acid matters as much as the acid itself. These three habits prevent most irritation.
A simple, safe starting routine
Start low and slow
Begin two or three evenings a week. Increase only if your skin stays comfortable after two weeks.
Apply to dry skin
Leave-on acids sting less on dry skin. Pat your face dry after cleansing and wait a minute.
Always moisturise and use sunscreen
Acids make fresh skin more sensitive to UV. In Pakistan's sun, a broad-spectrum SPF every morning is non-negotiable while you exfoliate.
Patch-test anything new
Before you put a new acid on your whole face, try it on a small area along the jawline for two or three evenings. Mild tingling that fades within a minute is normal; burning, swelling or itching is not, and means the product or strength is wrong for you right now.
Can I use salicylic acid daily for acne?
Many oily and acne-prone skin types tolerate a daily salicylic acid cleanser well. With leave-on serums, most people do better with four or five nights a week. Daily use is fine if you see no dryness, peeling or stinging.
Do I need to wash my face after using salicylic acid?
Rinse cleansers off. Toners, serums and creams are leave-on products: you do not wash them off, you follow them with moisturiser.
What results can you expect, and when?
How long does salicylic acid take to clear breakouts?
Most people notice smoother texture within two weeks, and fewer clogged pores after four to eight weeks of steady use. Deeper, painful breakouts need a dermatologist.
How long does it take for glycolic acid to clear acne?
Glycolic acid is better at refining texture and marks than at clearing active spots. Give it six to eight weeks to show a visible difference in smoothness and glow.
Does salicylic acid remove dark spots?
It helps indirectly: by keeping pores clear it prevents new breakouts, and therefore new marks. For marks that already exist, pair exfoliation with a brightening ingredient such as niacinamide or vitamin C, and protect with sunscreen so marks do not darken.
Does salicylic acid reduce sebum production?
It does not switch oil glands off, but it dissolves the oil sitting in pores and makes skin look less shiny. Many people find their T-zone stays fresher for longer.
How to combine acids with the rest of your routine
What goes first, vitamin C or glycolic acid?
Use them at different times: vitamin C in the morning under sunscreen, glycolic acid at night. Layering two strong acids together is a common cause of irritation.
Which is better, tretinoin or salicylic acid?
They do different jobs. Tretinoin is a prescription retinoid that changes how skin cells turn over; salicylic acid is an over-the-counter exfoliant for pores. If a doctor has prescribed tretinoin, ask before adding acids, and never use both on the same night when you are starting out.
Which is better, niacinamide or salicylic acid?
They work well together. Salicylic acid clears pores; niacinamide calms redness and supports the skin barrier. Use the acid at night and niacinamide morning or night.
Can I use a toner that combines AHA and BHA?
Yes, blended toners are made to be balanced. The COSRX AHA/BHA Clarifying Treatment Toner and the Beauty of Joseon Green Plum Refreshing Toner are two gentle daily options. Strong rinse-off peels such as the The Ordinary AHA 30% + BHA 2% Peeling Solution are a different category: use them no more than once a week, and never on broken or sunburnt skin.
Exfoliating in Pakistan's heat, humidity and hard water
Summer humidity makes skin oilier, which pushes many people towards stronger acids, but sweat, heat and UV also make irritation more likely. In peak summer, keep acids to the evening and avoid using them before long days outdoors. In winter, dry indoor heating and hard water can leave skin tight, so reduce how often you exfoliate and moisturise more. During the monsoon, clogged pores often flare up, which is a good season for a regular BHA cleanser.
If you are buying acids online, make sure they are original: fakes can contain the wrong percentage or irritating fillers. Every product at YESBEAUTY is sourced through official channels and covered by the YESBEAUTY Authenticity Promise. Browse cleansers by skin type in our cleanser edit.
Common exfoliation mistakes to avoid
Using too many acids at once
An acid cleanser, an acid toner and an acid serum on the same night is too much for most skin. Pick one leave-on acid and keep the rest of the routine gentle.
Skipping sunscreen
Freshly exfoliated skin burns and marks more easily. Without SPF, acids can make uneven tone look worse.
Ignoring warning signs
Stinging that lasts, flaking, tightness and shiny "glassy" patches are signs of over-exfoliation. Stop all acids for a week, use a plain cleanser and moisturiser, then restart less often.