Dandruff, also known as seborrheic dermatitis, is a common condition characterized by the presence of white or gray flakes of skin on the scalp. It can also cause itching and redness on the scalp. Dandruff is not a serious condition, but it can be uncomfortable and embarrassing.

There are several reasons for dandruff, including :

• Oily skin: The scalp naturally produces oil, and people with oily skin tend to have more dandruff.
• Dry skin : dry skin can also cause dandruff.
• Fungal infection : Malassezia, a type of yeast that lives on the scalp, can cause dandruff when it grows out of control.
• Medical conditions : Certain medical conditions, such as eczema, psoriasis, and rosacea, can cause dandruff.
• Medications : Certain medications, such as blood thinners, antidepressants, and blood pressure medications, can cause dandruff as a side effect.

Symptoms of dandruff include :

• White or gray flakes of skin on the scalp
• Itching and redness on the scalp
• Oily or greasy scalp