10 Common Causes of Oily Hair (2024)

How You Wash & Condition

Would you believe us if we said almost all of your good or bad hair days begin in the shower? It’s true—how you wash and condition thick or thin hair plays a huge role in not only how it looks that day, but also how it will look until your next wash day.

If you’re thinking abouthow to get rid of greasy hair, it’s important to know what’s causing it in the first place. Here are a few things you could be doing wrong in the shower that result in oily, greasy hair. The good news? Switching up your care routine is fairly simple once you’ve identified the misstep.

10 Common Causes of Oily Hair (1)

#1 Overwashing

If you wash your hair every day or every other day and still experience greasy roots, overwashing may be to blame. Shampooing is necessary to rid your hair of its natural oil,dirt, grime, and product, but too much of a good thing is true with shampoo.

When you wash your hair, you also strip it of some of its natural oil (which is why you should always focus the suds at the roots, not the ends, of your hair). If you wash your hair too often, you can trigger an overproduction of those natural oils, creating excess sebum production, and bang—you’ve got greasy hair the next day, or even just hours after rinsing.

While it may be difficult at first to put up with greasy roots, the only way to solve this problem of why your hair gets greasy so fast is to go longer in-between washes. Reach for thedry shampooto cleanse hair between washes and embrace a messy bun or french braid hairstyle, or finish off your second-day style with somehair volume sprayto create a more lived-in look.

#2 Underwashing

While overwashing your hair can cause it to overproduce in the oil department, under washing canalsocause oily hair. Most of us are familiar with this culprit—go a few days or a week without washing, and we gradually notice grease start to form on our healthy scalp. Dirt, sweat, pollution, and product begin to build upon the hair, signaling that it’s time for a good cleanse.

The key is to strike the right balance between overwashing and under washing. Only you can know what is right for your hair. To figure it out, you may need to experiment. If you regularly experience oily hair, divert from your usual washing routine by increasing or decreasing how frequently you wash by one day for at least two weeks. If you notice an improvement, you might try increasing or decreasing how frequently you wash by another day. Soon, you’ll learn how many days between washes are optimal for you.

#3 Using the Wrong Shampoo

If you’ve experimented with your wash cycle and aren’t seeing any improvement, it’s time to take a closer look at theshampoo productyou’re using and explore the differenttypes of shampooyou can try. It could be too rich a formula for your fine hair or contain ingredients like silicones and parabens that can leave behind a greasy residue.

There are plenty of silicone-free andparaben-free shampoosavailable that are formulated for a variety of hair types. You can also look into a clarifying shampoo that’s sulfate-free or find thebest shampoo for oily hair. Make sure you read the description carefully to find the right clarifying shampoo for your hair. For instance, ourFull Shampoois formulated for fine, flat hair, while ourPerfect Hair Day Shampoois optimal for most hair types.

You could also be washing your hair the wrong way. Yeah, you’d think after a lifetime of shampooing your locks, you’d be an expert at it, but that’s not always the case. You know when you visit the salon, and your hair feels squeaky clean for days? Your stylist probably spent a lot of time lathering your hair and massaging your scalp at the shampoo bowl. Take a cue from the pros and give your greasy scalp a good, gentle rub down all over when you wash. You may even considerdouble shampooingto help clear away any excess oil or product residue.This helps promote not only a healthy scalp but healthy hair as well. Then, be sure to thoroughly rinse out all the products. This helps promote not only a healthy scalp but healthy hair as well. Then, be sure to thoroughly rinse out all the products.

#4 Using Too Much Conditioner

We get it, nothing makes it easier to run a hairbrush through freshly showered hair than a big dollop of conditioner, but if you’re going through a bottle quickly or putting it all over your hair and scalp, you’re doing it wrong and could be causing your hair to become oily. When you lather on the conditioner, stick to using it from the mid-lengths to the ends of your hair where the most tangles and damage occur.

Truthfully, the roots of your hair need less conditioner than the ends because the oils your scalp produces supply natural conditioning. So, take it easy on the conditioner, and you’ll notice less oil and buildup, and keep those locks feeling fresh for longer.

10 Common Causes of Oily Hair (2024)

FAQs

Is greasy hair a symptom of anything? ›

Persistently greasy hair may be due to an overproduction of sebum, which can sometimes indicate an underlying health condition. However, the way people wash and care for their hair, and the type of hair products they use, may be the cause.

What deficiency causes greasy hair? ›

Vitamin B contributes to the production and regulation of sebum levels. A deficiency in this can cause your body to react by producing more oil. Foods that are high in Vitamin B include whole grains, eggs, meat and dairy.

Why is my hair greasy for no reason? ›

Hormones: Hormone fluctuations in both men and women can be triggered by stress, puberty, pregnancy, menopause or medications (including birth control pills) and can result in excessive sebum production. If you notice a sudden onset of greasy hair, your hormone levels might be the culprit.

What is the root cause of greasy hair? ›

Brushing: Brushing your hair too much can stimulate sebaceous glands and increase oil production. Touching: Touching your hair too much can cause oil to spread from your fingers to your hair and make it look greasy. Products: Using too many hair products can lead to product buildup.

Why is my hair getting greasy as I get older? ›

Women going through perimenopause and menopause experience a change in their hormone levels. One hormone, androgen, surges, increasing the production of sebum in the scalp. Sebum is vital to our hair, protecting it from environmental damage and keeping it supple, but too much can lead to a greasy look.

What hormone makes hair greasy? ›

If so, your hormones may be to blame. Similarly, testosterone increases oil production. People with polycystic ovary syndrome (PCOS), which is characterized by elevated testosterone, may notice symptoms like oily skin. 3 This could also include the scalp, making the hair appear greasy.

Can low vitamin D cause greasy hair? ›

Vitamin D is responsible for regulating the sebum content in the body. A deficiency could lead to an imbalance in our scalp oil levels.

What vitamins stop oily hair? ›

Essential fatty acids, zinc, B vitamins and vitamin E, on the other hand, help to prevent the overproduction of oil. Pack your diet full of wholegrains, fish, nuts, seeds, oats, shellfish, eggs, beans and leafy greens and marvel at your newfound healthy, glossy hair.

What medications cause oily hair? ›

Medications

Since hormonal activity influences hair's oiliness, it may not be surprising that some kinds of birth control medication can increase your sebum secretion (especially mini-pills, which only contain progesterone).

How can I stop my hair from being so greasy? ›

Try some of these tips:
  1. Increase how often you wash your hair. Oily hair may need to be washed every other day or even every day.
  2. Choose the right shampoo. ...
  3. Rinse your hair thoroughly to avoid leaving any soap residue. ...
  4. Find a good dry shampoo.
Nov 7, 2022

Why is my hair always greasy even after I shower? ›

#1 Overwashing. If you wash your hair every day or every other day and still experience greasy roots, overwashing may be to blame. Shampooing is necessary to rid your hair of its natural oil, dirt, grime, and product, but too much of a good thing is true with shampoo.

Why is my hair so greasy after 1 day? ›

Overproduction of sebum, overwashing, hair type, and product buildup are common causes of greasy hair. Choosing the right shampoo and using it correctly can help minimize oiliness. Essential oils, apple cider vinegar, and aloe vera are potential home remedies for greasy hair.

What health problems cause greasy hair? ›

Certain medical conditions, such as polycystic ovary syndrome (PCOS) and hypothyroidism, can also cause oily hair. These aren't the only medical reasons for greasy hair, so it's worth speaking with your health care provider to rule out any conditions that could be causing excess oil.

Why is my hair more oily than usual? ›

Sometimes, it's related to hormones, the styling products you use, or a dry scalp, which makes your scalp produce more oil. How can I tame oily hair? You can decrease oily hair by using clarifying shampoos (sparingly), limiting your intake of processed foods, and skipping out on heavy conditioners and styling products.

Is oily hair healthy? ›

An overly greasy scalp can lead to uncomfortable itching and seborrheic dermatitis. It can even increase dandruff. But you don't want to strip off all your oil. Natural oils protect hair and support a healthy scalp and hair.

Does greasy hair mean unhealthy? ›

Oily hair isn't healthy or unhealthy by default. People with an oily scalp can have healthy hair or dry, brittle hair. Your hair needs oil to be healthy, but too much oil can lead to buildup on the hair and scalp. Oily skin may also contribute to a condition called seborrheic dermatitis.

Why does my hair always appear greasy? ›

Greasy hair is caused by the sebaceous glands on your scalp producing too much oil. The oil is then absorbed by your hair, and travels down its lengths – when there's too much, it makes your hair look clumpy and dull.

Why does my hair get greasy after 1 day? ›

If you wash your hair too often, you can trigger an overproduction of those natural oils, creating excess sebum production, and bang—you've got greasy hair the next day, or even just hours after rinsing.

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