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You know you have combination skin when:

In some areas of your face it can feel tight after washing; it can be flaky, look dull or feel rough
In other areas, typically the T-zone, your skin looks shiny, feels greasy and is prone to pimples and blackheads.

You know you have oily skin when:

Your pores are clogged
Your skin is usually the oiliest in the T zone area, which is across the forehead, down the nose and chin
Your face looks shiny

Your skin feels greasy
Your makeup wears off within a few hours of application
You are prone to pimples, blackheads and whiteheads.

You know your skin is dry when:

Skin feels tight
Skin can be flaky
Pores aren't very visible
Skin looks dull
Skin feels rough
Skin feels itchy

You know you have sensitive skin when:

You are prone to blotchy skin patches
Products often cause redness and irritation
Skin breaks out with exposure to household cleaners
Alpha hydroxy acids and retinols cause irritation