Home › Blog › Alopecia Areata: Why Hair Falls Out in Patches and How It Is Treated

Alopecia Areata: Why Hair Falls Out in Patches and How It Is Treated

It is often a barber or a family member who spots it first: a smooth, round bald patch, usually on the scalp, that was not there a few weeks ago. The skin looks normal, nothing itches, and the edges are clean. This is the classic picture of alopecia areata, and while it is alarming, it is also very treatable.

This guide explains what causes it, how it is told apart from conditions that look similar, and what treatment involves. It is general education and does not replace an examination.

What Alopecia Areata Is

Alopecia areata is an autoimmune condition. The immune system mistakenly attacks hair follicles, which stop producing hair, but the follicles are not destroyed. That is why hair can grow back, sometimes on its own and often faster with treatment. The American Academy of Dermatology explains alopecia areata in detail.

It can affect anyone at any age, including children. It is not contagious and is not caused by anything you did. It sometimes runs in families and is more common in people with other autoimmune conditions such as thyroid disease, vitiligo or allergic conditions like eczema and asthma.

What It Looks Like

• One or more round or oval patches, usually the size of a coin, on the scalp, beard or eyebrows.
• Smooth skin with no scaling, redness or scarring.
• Short broken hairs at the edges that taper towards the root, which doctors call exclamation-mark hairs.
• Sometimes, pitting or ridges on the nails.

Less often, patches join up, or hair is lost across the whole scalp or body. These forms need closer specialist care.

Is It Alopecia Areata or Something Else?

Several conditions cause patchy hair loss, and they are treated very differently, which is why the first step is an examination. Scalp ringworm, common in children, causes patches with scaling, broken hairs and sometimes swelling; it needs antifungal treatment by mouth, as we explain in why fungal infections keep coming back. Hair pulling, tight hairstyles and scarring conditions can also leave bald areas.

The doctor examines the scalp under magnification, looks for exclamation-mark hairs and scaling, and may check blood for thyroid problems, low iron or vitamin deficiencies. Diffuse shedding after illness is a different condition again, covered in our guide to hair fall after fever or illness.

How It Is Treated

Treatment depends on how many patches there are, where they are, and how long they have been present.

• Steroid injections into the patch are the main treatment for a few patches on the scalp or beard in adults. Small injections every four to six weeks calm the immune attack locally, and regrowth often starts within one to three months. The AAD lists the treatment options doctors use.
• Prescription creams and lotions are used for children, for the eyebrows, and between injection sessions.
• Supporting treatments such as light therapy may be added for stubborn patches.
• Extensive cases, where large areas or the whole scalp are affected, need specialist plans that may include tablets. These are discussed in detail with you because they need monitoring.

New hair sometimes grows in white or fine at first and darkens and thickens over the following months.

Will It Come Back?

Many people have a single episode that clears completely. Others have patches that come and go over years. Early treatment of new patches usually gets the best response, so it is worth returning promptly if a new one appears. Stress and illness can trigger flares, but they are not the root cause.

Where to Get Treated

Every Dr. Thaj branch diagnoses patchy hair loss. Steroid injections for alopecia areata are given at our Chennai, Pondicherry, Ooty, Thalassery and Kannur clinics. See hair fall treatment in Thalassery or in Chennai for what a hair consultation involves.

Final Thoughts

A sudden bald patch is frightening, but in alopecia areata the follicles survive, and most patches regrow, especially with treatment started early. The first step is making sure it is alopecia areata and not an infection or another cause. The guidance here draws on the experience of Dr. Thaj Laser Skin & Hair Clinic, treating hair conditions in South India since 1998.

Frequently Asked Questions

Will my hair grow back?

In most people with a few patches, yes. The follicles are not destroyed, so hair can regrow on its own, and treatment usually speeds it up. New hair may grow in white or fine at first.

Is alopecia areata contagious?

No. It is an autoimmune condition and cannot spread from person to person. Scalp ringworm, which can look similar, is contagious, which is why the diagnosis matters.

Do the injections hurt?

They are small injections into the patch and feel like quick pinpricks. They are usually repeated every four to six weeks until the hair grows back.

Is stress the cause?

Stress can trigger a flare in someone who is prone to it, but the underlying cause is the immune system attacking hair follicles. Treating the patch works better than waiting for stress to pass.