As a dermatologist with years of experience in skin and hair health, I've encountered numerous cases of itchy scalps and can provide a comprehensive understanding of what might be causing this discomfort.

Itchy scalp, or pruritus capitis, is a common condition that can be caused by various factors. Here are some of the potential causes:


1. Dandruff: It is one of the most common causes of an itchy scalp. Dandruff is caused by a yeast-like fungus called Malassezia that lives on your scalp. This fungus can cause irritation and flaking.


2. Seborrheic Dermatitis: This is a skin condition that causes a red, itchy rash that can affect your scalp. It is similar to dandruff but more severe and may require medical treatment.


3. Contact Dermatitis: This occurs when your scalp comes into contact with an irritant, such as a hair product or dye, and your skin reacts to it.


4. Psoriasis: A chronic skin condition that causes cells to build up rapidly on the surface of your skin, leading to red, scaly patches that can be itchy.


5. Alopecia Areata: An autoimmune disorder that causes hair to fall out in small, round patches and can also cause itching.


6. Ringworm (Tinea Capitis): A fungal infection that affects the scalp and can cause a red, itchy, circular rash.

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Bacterial Infections: Such as folliculitis, which is an infection of the hair follicles that can cause itching and sometimes pain.

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Dry Skin (Xerosis): This can cause your skin, including your scalp, to become dry and itchy.

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Allergic Reactions: To food, medication, or environmental factors that can cause an itchy reaction on the scalp.

10.
Nervous System Disorders: Certain conditions, such as multiple sclerosis or Parkinson's disease, can cause itching as a symptom.

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1. Stress: Psychological stress can sometimes manifest as physical symptoms, including an itchy scalp.

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2. Poor Hygiene: Not washing your hair regularly can lead to a buildup of oils and dead skin cells, which can cause itching.

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3. Hairstyles: Tight hairstyles that pull on the scalp can cause irritation and itching.

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4. Nutritional Deficiencies: Lack of certain nutrients, such as zinc or iron, can lead to an itchy scalp.

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5. Medical Conditions: Certain systemic conditions, like thyroid disorders or liver disease, can cause skin symptoms including itching.

It's important to note that while these are common causes, an itchy scalp can also be a symptom of more serious conditions. If the itching is persistent, severe, or accompanied by other symptoms such as hair loss, a rash, or pain, it's crucial to consult with a healthcare professional for a proper diagnosis and treatment.

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If you're constantly scratching your head because of an itchy scalp, it could be more than just dandruff. Many conditions can cause an itchy scalp -- from dandruff to ringworm or something more serious like a bacterial infection or autoimmune condition.Apr 13, 2016read more >>