Dear Sir, My wife age is 30.And she have too much...

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regarding your question
Dandruff is a condition of the scalp that causes flakes of skin to appearand ,its is a common condition, which is marked by itching.
The following are factors that may contribute to dandruff:
1) Not enough hair brushing
2) Yeast
3) Dry skin.
4) Seborrheic dermatitis (irritated, oily skin).
5) Not enough shampooing
treatment:
Dandruff can almost always be controlled
In general, daily cleansing with a gentle shampoo to reduce oiliness and skin cell buildup can often help mild dandruff.
Dandruff shampoos are classified according to the medication they contain:
    Pyrithione zinc shampoos (such as Head & Shoulders, Jason Dandruff Relief 2 in 1). These contain the antibacterial and antifungal agent zinc pyrithione. This type of shampoo can reduce the fungus on your scalp that can cause dandruff and seborrheic dermatitis.
    Tar-based shampoos (such as Neutrogena T/Gel). Coal tar, a byproduct of the coal manufacturing process, helps conditions such as dandruff, seborrheic dermatitis and psoriasis. It slows how quickly skin cells on your scalp die and flake off. If you have light-colored hair, this type of shampoo may cause discoloration.
    Ketoconazole shampoos. Ketoconazole is a broad-spectrum antifungal agent that may work when other shampoos fail. It's available over-the-counter as well as by prescription.
 
if these shampoos failed to mange your case , then we can use a steroid creams to get rid of the dandruff
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