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What Causes Oily Skin? (Complete Beginner Guide)
Oily skin is one of the most common skincare concerns, and it can be frustrating
to deal with daily shine, clogged pores, and frequent breakouts. If you’ve ever
wondered why your skin produces so much oil—or how to control it—you’re not alone.
The truth is, oily skin isn’t caused by just one thing. It’s usually a combination of
internal and external factors that affect how much oil (sebum) your skin produces.
Looking for products that actually help control oily skin? Check out our:
Best Acne Products for Oily Skin (2026 Guide).
In this guide, we’ll break down what causes oily skin, what makes it worse, and what
you can do to manage it effectively.
What Is Oily Skin?
Oily skin happens when your sebaceous glands produce too much sebum, a natural
oil that helps protect and hydrate your skin.
While sebum is essential for healthy skin, too much of it can lead to:
A shiny or greasy appearance
Enlarged pores
Blackheads and whiteheads
Frequent acne breakouts
What Causes Oily Skin?
One of the biggest factors is simply your genetics.
If your parents had oily skin, there’s a strong chance you will too. Your skin type is
largely inherited, including how active your oil glands are.
Hormones play a major role in oil production.
Increased levels of androgens (common during puberty, stress, or hormonal changes)
can cause your oil glands to produce more sebum.
This is why oily skin is especially common during:
Teenage years
Menstrual cycles
Stressful periods
It may seem logical to wash your face more if it’s oily—but this can actually make things
worse. Over-cleansing or using harsh products can strip your skin, causing it to produce
even more oil to compensate.
Heavy creams or products not designed for your skin type can clog pores and increase
oiliness.
Look for products labeled:
Oil-free
Non-comedogenic
Lightweight or gel-based
Hot and humid environments can increase oil production. During warmer months, your
skin may naturally become more oily due to:
Heat
Sweat
Increased pore activity
Stress triggers hormonal changes that can increase oil production.
This is why breakouts often happen during stressful times.
While diet isn’t the main cause, some people notice increased oiliness with:
High sugar intake
Dairy products
Highly processed foods
If you're already dealing with breakouts from oily skin, check out our:
Best Acne Products for Oily Skin (2026 Guide).
Avoid these common mistakes:
Washing your face too often
Skipping moisturizer
Using alcohol-based products
Touching your face frequently
Not removing makeup properly
Here's a simple routine that works:
To make this routine easier, see our recommended products here:
View Best Acne Products Under $30 (2026 Guide)
Morning Routine
Gentle cleanser
Lightweight moisturizer
Oil-free sunscreen
Evening Routine
Cleanser
Treatment (like salicylic acid or benzoyl peroxide)
Light moisturizer
Look for products with:
Salicylic acid → unclogs pores
Niacinamide → controls oil
Benzoyl peroxide → reduces acne bacteria
Want products with these ingredients already selected for you?
Check out: Best Acne Products Under $20 (2026 Guide)
Frequently Asked Questions (Oily, Sensitive, Acne-Prone Skin)
What causes oily skin the most?
The main causes are genetics and hormones. These determine how much oil
your skin naturally produces.
Can oily skin be cured permanently?
No, but it can be managed effectively with the right routine and products.
Is oily skin good or bad?
Oily skin has benefits—it can age more slowly—but it requires proper care to
prevent breakouts.
Why is my face oily but also dry?
This can happen when your skin is dehydrated. Your skin produces more oil
to compensate for lack of moisture.
What ingredients should I avoid if I have sensitive, oily skin?
Avoid:
Alcohol-based products
Heavy fragrances
Harsh scrub
What’s the difference between oily skin and acne-prone skin?
Oily skin produces excess oil, while acne-prone skin is more likely to develop
breakouts. You can have one or both.
Can sensitive skin also be oily?
Yes. Sensitive skin can still produce excess oil, which makes choosing gentle
products very important.
How often should I wash oily skin?
Twice a day—morning and night. Washing more than that can make oil production
worse.
Does oily skin need moisturizer?
Yes. Skipping moisturizer can actually increase oil production.
What is the best ingredient for oily, acne-prone skin?
Salicylic acid is one of the most effective ingredients for controlling oil and clearing
pores.
Explore our full guides for clearer skin: