Does dimethicone cause acne?

Why is dimethicone in moisturizers?

Dimethicone is a silicone that forms a thin, nongreasy layer on the skin and helps smooth its surface. It works as an emollient, an ingredient that softens and smooths skin, and as a protective barrier. Those properties make it useful in moisturizers and acne medication formulas without adding a greasy shine. A surface layer is not the same thing as a blocked pore.1

Moisturizing matters during acne treatment because benzoyl peroxide, retinoids and salicylic acid can cause dryness or irritation. A moisturizer can support treatment, particularly when benzoyl peroxide or a retinoid is prescribed. Dimethicone's role here is moisturizing and helping protect the skin barrier, not replacing an acne medicine. More than half of 52 moisturizers marketed for acne contained dimethicone, glycerin or both.3

What if a product containing dimethicone breaks you out?

Do not assume dimethicone is responsible just because its name appears on the label. An individual ingredient's pore clogging potential does not reliably predict how a finished product behaves. Even a formula containing ingredients considered comedogenic can be noncomedogenic. Judge the finished formula rather than treating its ingredient list as a police lineup.2

Acne begins when pores or hair follicles become clogged with dead skin cells and sebum, the natural oil your skin produces. Oily or greasy personal care products can increase the risk of clogged pores. Hormone fluctuations and genetics also play a strong role, so a new breakout is not automatically an ingredient problem. Blackheads and whiteheads are plugged pores; deeper, swollen, painful bumps need a different treatment approach.45

How should you choose and use a moisturizer?

For acne prone skin, look for a water based moisturizer labeled oil free or noncomedogenic. Dimethicone does not need to be excluded. If a moisturizer seems to worsen your breakouts, choose a replacement using those same criteria rather than making silicone avoidance the only requirement.16

Wash gently and moisturize every morning and night, and after exercise. Remove makeup before bed and use sunscreen daily, choosing an oil free, noncomedogenic formula. Do not scrub away oil or pick at clogged pores. Irritating the skin can lead to more breakouts, and squeezing blemishes can damage pores and cause scarring. These are general acne care steps, not special rules for dimethicone.456

How long should you wait for clearer skin?

An acne treatment usually needs six to eight weeks of consistent use before improvement becomes visible. For comedonal acne, meaning blackheads and whiteheads, improvement can take eight to twelve weeks, with clearing taking many months. These timelines are for acne care and treatment, not a countdown for dimethicone to clear your skin. Changing your moisturizer alone is not a substitute for treating persistent acne.45

When should you see a dermatologist?

Get help for deep, painful breakouts rather than relying on an ingredient swap. A dermatologist can identify the type of acne and treat clogged pores, bacteria, inflammation and excess oil together. Seek help if good skin care has not improved your acne after a few months, or if acne is affecting how you feel about yourself. Tell your prescriber about medication side effects rather than assuming your moisturizer is the cause.456