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Alopecia Areata
Mild
Alopecia areata is an autoimmune condition that causes the immune system to attack hair follicles, resulting in hair loss. It commonly produces one or more smooth, round patches of hair loss on the scalp or other areas of the body, although more extensive forms can affect much of the scalp or all body hair. Hair may regrow spontaneously, but the course is unpredictable and repeated episodes can occur. Changes to the nails may accompany more extensive disease.
Body System
Skin Hair & Nails
When to Seek Medical Attention
Alopecia areata is generally not an emergency. Seek medical assessment for sudden, extensive, rapidly progressing, or recurrent hair loss, or when the diagnosis is uncertain. Prompt evaluation is appropriate if hair loss is accompanied by significant skin inflammation, pain, scarring, or other concerning symptoms.
Symptoms
1
Causes
3
Treatments
5
Diet
3
Overview
Alopecia areata is an autoimmune condition that causes the immune system to attack hair follicles, resulting in hair loss. It commonly produces one or more smooth, round patches of hair loss on the scalp or other areas of the body, although more extensive forms can affect much of the scalp or all body hair. Hair may regrow spontaneously, but the course is unpredictable and repeated episodes can occur. Changes to the nails may accompany more extensive disease.
Symptoms 1
Joint Stiffness
Causes 3
Alopecia areata develops when the immune system mistakenly attacks structures associated with hair follicles. The exact reason this autoimmune response begins is not fully understood. Genetic susceptibility can increase risk, and environmental or other immune triggers may contribute. Alopecia areata is not caused by poor hygiene and is not simply a consequence of ordinary stress, although stressful events may coincide with onset or worsening in some people. Other autoimmune conditions may occur in association with alopecia areata.
Autoimmune Disorder
Genetics
Stress
Risk Factors
Risk factors for alopecia areata include a family history of the condition and a personal or family history of autoimmune disease. It can occur at any age but often begins earlier in life. Certain immune-related conditions may increase susceptibility. The presence of a risk factor does not predict how extensive hair loss will become. Some people develop alopecia areata without any known risk factor.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Alopecia areata is generally diagnosed through examination of the pattern of hair loss and the scalp, together with medical and family history. Dermoscopy can reveal characteristic changes in affected follicles. A scalp biopsy may be considered when the diagnosis is uncertain. Blood tests can be useful when there are signs of associated autoimmune, thyroid, nutritional, or other conditions. The clinician also considers other causes of patchy hair loss, including fungal infection and scarring disorders.
Prevention
Key Prevention Tips
There is no proven way to prevent alopecia areata because its autoimmune triggers are not fully understood
Maintaining general health and managing associated autoimmune conditions can support overall well-being but cannot guarantee prevention
People with sudden patchy hair loss should seek evaluation because some causes are treatable and early diagnosis can guide management
Avoiding unnecessary scalp trauma or harsh hair treatments can reduce additional hair damage, although these practices do not prevent the autoimmune process
Prevention Guidance
There is no proven way to prevent alopecia areata because its autoimmune triggers are not fully understood. Maintaining general health and managing associated autoimmune conditions can support overall well-being but cannot guarantee prevention. People with sudden patchy hair loss should seek evaluation because some causes are treatable and early diagnosis can guide management. Avoiding unnecessary scalp trauma or harsh hair treatments can reduce additional hair damage, although these practices do not prevent the autoimmune process.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 3
Recommended Foods
Protein-rich Foods
Support hair growth
Iron-rich Foods
Support hair health
Fresh Fruits
Provide nutrients
Foods to Avoid
Highly Processed Foods
May affect overall health
Excess Sugar
Limit intake
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
An autoimmune condition causing patchy hair loss.
The immune system attacks hair follicles.
Hair may regrow in many cases.
Stress may trigger or worsen episodes.
Treatment may include topical or injectable therapies.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.