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while shouting at your reflection in the mirror.

Head of female with dirty greasy hair

Softulka / Getty Images

(Okay, maybe thats a little dramatic.

But still, its frustrating!)

So why does this happen?

Well, there are actually a lot of different reasons your hair may be getting greasy so fast.

What causes oily hair?

That answer, at least, is simple: our scalps.

Our scalps are loaded with oil glands, just as our faces are.

Thus that potentially unpredictable oily hair.

Cue the aforementioned frustration!

(Or just based on some experimentation.)

Why is my hair getting oily so fast?

Hairstylist at SCK SalonDevin Tothtells SELF this is the number-one cause for oily hair.

The oil has only one place to go, and that is out.

Washing your hair helps remove the built-up oil from your hair.

Why is my hair so oily even after I wash it?

There are some obvious potential reasons behind this, like using shampoo that doesnt clean thoroughly enough.

But theres also a more surprising potential reason.

How often should you wash your hair if it is oily?

People with thin hair wash it more often, with a gentle shampoo, Toth explains.

People with curly hair wash it less frequently.

Not sure if your excess grease is the result of overwashing?

If your oily scalp improves, youve got your answer.

If youre ever unsure, talk to your hairstylist next time youre at the salon!

Theyre the only person that may know your hair better than you.

Can my period cause oily hair?

If you have to ask, you probably already know: yup.

File this under yet another wayyour periodcan affect your entire body.

(Fun fact: This is also the same reason that you may developacnebreakouts around this time.)

Its worth switching up your shampoo during your period if this happens to you.

Do certain hairstyles make oily hair worse?

The big factor here is how tight the hairstyle is.

What is the best shampoo for oily hair?

A clarifying shampoo gently cleanses away any product buildup or outside-pollution buildup in your hair, Louis says.

The R+Co Oblivion Clarifying Shampoo is a cult classic and another great choice for many with oily strands.

Do styling products make hair more oily?

They definitely can, especially if you have thinner strandsfine hair is notorious for getting greasy fast.

These products can make thin hair look flat, greasy, and dirty.

Does hair pop in influence how oily my hair will be?

Brushing helps this happen more thoroughly by spreading oil along the length of the hair with each stroke.

That can allow oil to start accumulating around the scalp.

In some cases this means an oily scalp and dry ends, says Reyman.

Can dry scalps be oily?

This may further trap oil and make the hair look greasy.