Alopecia - Types, Causes, Diagnosis, Treatment, and Prevention

What Is Alopecia?

Alopecia, also called hair loss, is a condition where hair falls out faster than new hair can grow back. This happens when the normal hair growth cycle is disturbed. Hair loss can be temporary, in which case the hair grows back, or permanent, in which case regrowth may not occur.

Hair loss is very common and affects millions of people worldwide. In the United States alone, more than 80 million people experience hair loss.

• Alopecia in Children: Hair loss in children is uncommon. It is often caused by alopecia areata and tinea capitis. About 1 in 1,000 children and teens get alopecia areata

• Alopecia in Women: The most common type in women is androgenetic alopecia (female pattern hair loss). More than 50% of women experience hair loss at some point in their lives.

• Alopecia in Men: The most common type in men is androgenetic alopecia, also called male pattern baldness. It affects about 30 to 50% of men by age 50, and up to 80% as they get older.

What Are the Types of Alopecia?

The main types are:

1. Androgenetic Alopecia:

• This is the most common type of hair loss. It is also called pattern baldness.

• In men, it usually causes a receding hairline.

• In women, it causes thinning of hair all over the scalp, especially where the middle part becomes wider.

• About 50 million men and 30 million women in the United States have this condition.

• It can start as early as the teenage years, and many people notice signs before age 30.

• Genes inherited from family members cause about 80% of the risk.

2. Alopecia Areata:

• Alopecia areata is an autoimmune disorder. Here, the immune system mistakenly attacks healthy hair follicles. Hair falls out in small, round, coin-shaped patches.

• It can affect the scalp, face, or body.

• About 2% of people worldwide, or 1 in 50 people, may develop alopecia areata.

• Around 160 million people worldwide have had, or may have, this condition in their lifetime.

• In the United States, nearly 7 million people are affected.

• Children and teenagers can also get it. About 1 in 1,000 children and teens develop alopecia areata, and nearly 20% of all cases happen in children.

• Main types include:

  • Patchy Alopecia Areata: Causes small, round bald patches.

  • Alopecia Totalis: Causes the complete loss of scalp hair.

  • Alopecia Universalis: This type causes complete hair loss on the entire body.

  • Persistent Patchy Alopecia Areata: This is a long-lasting form of alopecia areata in which bald patches keep recurring. It usually does not lead to complete body hair loss, and treatments may help hair grow back.

  • Ophiasis Alopecia: Ophiasis alopecia is a type of alopecia areata that mainly affects the sides and back of the scalp.

3. Telogen Effluvium:

• It is a temporary type of hair loss that causes heavy hair shedding or thinning.

• It often happens after stress, illness, shock, or a major life event.

• Normally, about 50 to 100 hairs fall each day. With telogen effluvium, a person may lose 300 or more hairs daily.

• About 30% of hair can move into the resting phase and fall out.

• The good news is that hair usually grows back within about 6 months after the cause is treated or removed.

4. Traction Alopecia:

• Traction alopecia happens when hair is pulled tightly for a long time.

• Tight hairstyles, such as braids, ponytails, buns, or extensions, can damage hair roots and cause gradual hair loss.

5. Cicatricial (Scarring) Alopecia:

This is a rare group of disorders (such as lichen planopilaris) where hair follicles are destroyed and replaced with scar tissue. Hair loss is permanent because the follicles cannot regrow hair.

6. Lichen Planopilaris:

This is an inflammatory condition that mostly affects young women. It causes smooth bald patches on the scalp.

7. Frontal Fibrosing Alopecia:

This type usually causes slow hair loss near the forehead. Eyebrows and eyelashes may also fall out.

8. Central Centrifugal Cicatricial Alopecia (CCCA):

CCCA usually begins at the top center of the head and slowly spreads outward. It mostly affects Black women over the age of 30.

9. Alopecia Barbae:

Alopecia barbae is an autoimmune condition that affects beard hair. Hair falls out in small circular patches on the beard area.

10. Postpartum Alopecia:

Postpartum alopecia happens after childbirth when hormone levels drop quickly, causing extra hair shedding. It is temporary, and hair usually grows back within a few months.

What Are the Causes of Alopecia?

Causes include:

• Alopecia areata is an autoimmune condition where the immune system attacks hair follicles. Genetics and triggers, such as viral infections, may contribute to it.

• Pattern baldness (male or female pattern hair loss) is mainly caused by genetics.

• Hormonal changes during pregnancy, childbirth, menopause, or thyroid problems can trigger hair loss.

• Medical conditions such as immune system disorders, ringworm infections, and trichotillomania (hair-pulling disorder) can also cause alopecia.

• Medications and medical treatments like chemotherapy, radiation therapy, blood thinners, and some antidepressants may lead to hair loss.

• Stressful events, including high fever, major surgery, or emotional shock, can cause temporary hair shedding.

• Excessive hairstyling or tight hairstyles, such as pigtails and cornrows, may cause traction alopecia. Frequent hot-oil treatments can also damage hair and lead to hair loss.

• Nutritional deficiencies, such as low levels of iron, zinc, vitamin D, biotin, or protein, can contribute to hair shedding.

Seasonal Hair Loss

Seasonal hair loss is a temporary increase in hair shedding that can happen when the weather changes. It is common during the late monsoon, autumn, and spring. It usually lasts about 2 to 3 months and then stops on its own because the hair follicles are not damaged. It can happen because of:

• Hormonal changes.

• Humid weather.

• Stress.

• Poor nutrition or vitamin gaps.

How to Diagnose Alopecia?

Doctors use different tests to find out why hair loss is happening. These tests may include:

In-Office Clinical Assessments:

1. Pull or Tug Test: The doctor gently pulls small sections of hair to see how many hairs fall out. If more than 6 hairs come out from about 40 strands, it may indicate active hair loss.

2. Trichoscopy: A dermatoscope, a specialized magnifying tool, is used to examine hair roots, hair shafts, and the scalp.

3. Scalp Biopsy: A small medical procedure where the doctor takes a tiny piece of skin (about 4 mm) that has hair roots in it, so it can be looked at under a microscope to help find out what’s going on.

Blood Tests:

1. Complete Blood Count (CBC): Checks overall blood health.

2. Iron and Ferritin Test: Low iron stores (ferritin) are a common cause of hair thinning and hair fall.

3. Thyroid Panel: Tests thyroid hormones (T3 and T4) to screen for thyroid problems, which can trigger hair loss.

4. Vitamin Tests: Vitamin D and Vitamin B12 levels are checked because low levels can affect healthy hair growth.

Specialized Hormone and Inflammation Tests:

• Sometimes doctors may do extra tests if they think hair loss is linked to hormone problems, chronic stress, PCOS, or genetic hair loss.

How to Treat Alopecia?

Treatment for alopecia depends on the type.

Alopecia Areata:

• Corticosteroids are usually the first treatment. Doctors may inject them into the scalp every 4 to 6 weeks. Creams, ointments, or pills may also be used.

• JAK inhibitors like Baricitinib and Ritlecitinib can help calm the immune system and promote hair regrowth.

• Topical immunotherapy may be prescribed to trigger a mild allergic reaction that encourages hair growth.

• Minoxidil can also be used together with other treatments to help hair grow faster.

Androgenetic Alopecia:

• Minoxidil foam or solution is applied to the scalp every day.

• Finasteride is often used for men. It blocks the hormone that shrinks hair follicles.

• Spironolactone is an oral medicine often prescribed to women with hormonal hair loss.

Other Options:

• Light Therapy: Doctors may use UV light therapy, also called phototherapy, to stimulate hair growth.

  • Side effects: It is usually well-tolerated, but some people may experience scalp irritation or mild headaches.

• Microneedling: Tiny needles create small holes in the scalp to stimulate hair follicles and enhance the effectiveness of treatments like Minoxidil.

  • Side effects: Possible side effects include mild scalp irritation, pain, swelling, or minor bruising. Rare severe side effects include infection, scarring, or nerve damage.

• Platelet-rich plasma: Doctors take a small amount of blood, separate the platelet-rich plasma, and inject it into the scalp to help hair grow.

  • Side effects: It may cause pain, tenderness, swelling, bruising, and mild itching. In rare cases, it may cause infection, scar tissue, or nerve injury.

• Cosmetic Camouflage: Some people use wigs, hairpieces, scalp micro-pigmentation, or special hairstyles. These can help cover hair loss and improve confidence.

• Hair Transplants: Hair follicles are moved from thicker areas of the scalp to thinning or bald areas. This surgery is mostly used for pattern baldness.

Nutrition and Diet for Healthy Hair

Healthy hair needs good nutrition. Hair grows best with protein, iron, healthy fats, and vitamins.

1. Protein: It helps build keratin, the main hair protein. e.g., eggs, chicken, Greek yogurt, tofu, and lentils.

2. Iron: It helps bring oxygen to hair follicles. e.g., spinach, leafy greens, pumpkin seeds, and lentils.

3. Omega-3 Fatty Acids: They help keep the scalp healthy and hydrated. e.g., salmon, walnuts, flaxseeds, and chia seeds.

4. Biotin and Zinc: They help repair and grow hair. e.g., almonds, eggs, oysters, and sesame seeds.

5. Vitamins A and C: They help the scalp make natural oils and protect hair follicles. e.g., berries, sweet potatoes, and carrots.

How Can Hair Loss Affect Mental Health?

Hair loss can make people feel sad, worried, or less confident about how they look. Some people may feel stressed, avoid social situations, or even develop depression. In serious cases, talking to a counselor or mental health professional can really help.

Living With Alopecia

How to Take Care of Myself?

• Use sunscreen on the scalp to prevent sunburn.

• Wear caps, hats, or scarves to protect from UV rays.

• Wear sunglasses if you lose eyebrows or eyelashes.

• Use makeup, colored powders, or hair fillers to cover bald patches.

• Some people shave their heads for a more even look.

• Wigs and hairpieces can help boost confidence.

• Eat a healthy and balanced diet.

• Take supplements if needed.

Things to Avoid When You Have Alopecia

• Avoid tight hairstyles like buns, braids, and hair extensions.

• Avoid bleaching, perming, or chemical straightening.

• Do not use harsh hair styling tools or treatments.

• Avoid rough brushing or pulling the hair.

• Try to avoid too much sugar and inflammatory foods.

• Avoid drinks with artificial sweeteners.

• Limit alcohol intake.

• Use sun protection for your scalp.

• Try to manage stress and stay relaxed.

Myths About Alopecia

Myth 1: Can Wearing Hats Cause Baldness?

False. Hats do not cause alopecia.

Myth 2: Can Shampooing Too Often Cause Hair Loss?

Normal washing does not cause permanent hair loss.

Myth 3: Is Alopecia Contagious?

Alopecia areata is not contagious.

Myth 4: Is Stress the Only Cause?

Stress may trigger hair shedding, but it is not the sole cause.

Myth 5: Can Hair Oils Cure Baldness?

Hair oils may improve hair texture but cannot reverse autoimmune or genetic alopecia.

Conclusion:

Alopecia refers to excessive hair loss from the scalp or other parts of the body. Some people leave it untreated, while others use hats, scarves, wigs, or hairstyles to cover it. Some also choose treatments to help stop hair loss or regrow hair.

Before seeking any hair loss treatment, talk with a dermatologist about the cause of the hair loss and treatment options.

Key Takeaways:

• Alopecia means hair loss. It can affect only the scalp or the whole body.

• Up to 80% of men and 50% of women may experience pattern hair loss during their lifetime.

• There are different types, such as androgenetic alopecia, alopecia areata, telogen effluvium, and traction alopecia.

• Hair loss can occur due to genetics, hormonal changes, medical conditions, medications, stress, tight hairstyles, or poor nutrition.

• Treatment options include medicines, light therapy, microneedling, PRP therapy, wigs, and hair transplants.