SUISEN

Timeframe: Typically within 24 hours of washing your hair.

 

 

Signs:

If your scalp feels greasy and your hair becomes flat and oily within a day of washing, you likely have an oily scalp.

 

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Overactive sebaceous glands produce too much sebum, causing your hair to look weighed down and greasy. Overwashing can trigger even more oil production, leading to a cycle of oiliness.

Timeframe: Your scalp stays balanced for 2 to 3 days after washing, though some oil may appear due to weather or lifestyle.

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Signs:​

A normal scalp doesn’t feel excessively oily or dry. Your hair remains fresh and voluminous for a few days without becoming greasy or flaky.

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By day 2/3, you might notice slight oiliness, but it’s not overwhelming, and your scalp stays comfortable.

Timeframe: Often last for 3 days or more after washing.

 

Signs:

If your scalp feels itchy, irritated, and flaky for several days, you may have a dry scalp.

 

A dry scalp doesn’t produce enough sebum, leading to ongoing discomfort and dryness. This is distinct from dandruff, which can also occur with oily scalps.

Timeframe: Sensitivity can occur immediately after washing or build up over a few days if your scalp reacts to certain products or environmental changes.

 

Signs:

Burning, stinging, or prickling sensations on the scalp, often triggered by harsh chemicals or physical irritation.

 

A sensitive scalp might feel tender, especially when combing or brushing. This can cause you to avoid washing, moisturizing and styling your hair regularly.