AUTOIMMUNE HAIR LOSS

Alopecia areata: patchy hair loss explained

Alopecia areata is an autoimmune disorder that often causes sudden smooth, round, or oval bald patches. Read how to recognize the signs, how the progression can vary, and when professional assessment is advisable.

Briefly summarized

In alopecia areata, the immune system reacts incorrectly around the hair follicles, temporarily interrupting hair growth.
Characteristic features include smooth, round, or oval bald patches; Eyebrows, eyelashes, beard hair, or other body hair can also be affected.
The course is unpredictable: spontaneous regrowth is possible, but new patches or recurrence may occur.
Professional assessment is important, as other conditions can also cause localized hair loss.

AUTOIMMUNE REACTION

What happens with alopecia areata?

In alopecia areata, the immune system mistakenly reacts around the hair follicles. This interrupts normal hair growth and can cause hair to fall out in a defined area.

The hair follicles usually do not become scarred or permanently destroyed, so regrowth remains possible. Exactly why the immune reaction develops is not fully known; genetic predisposition and immune-related factors may play a role together.

RECOGNIZABLE SIGNALS

How can you recognise alopecia areata?

A sudden, smooth, round or oval bald patch is characteristic. The skin often looks normal, without obvious scaling or scarring. Sometimes short, tapered hairs are visible around the edges.

The patches can appear on the scalp, but may also affect the eyebrows, eyelashes, beard, or other body hair. Some people develop small pits or ridges in their nails.

Read about sudden hair loss

UNPREDICTABLE COURSE

What is the course of alopecia areata?

The course varies greatly from person to person. Hair may grow back spontaneously, sometimes initially finer or lighter in colour. It is not possible to predict in advance when this will happen or how complete the regrowth will be.

Existing patches may become larger, and new patches may develop. Alopecia areata can also return after regrowth. In a smaller proportion of people, the hair loss spreads across the entire scalp or body.

PROFESSIONAL REVIEW

How is alopecia areata diagnosed?

A doctor or dermatologist assesses the pattern of hair loss and examines the scalp, hair, and nails. A dermatoscope can be used to examine hair follicles and features at the edge of an affected area more closely.

Additional testing is not always necessary. If there is any doubt, blood tests, testing for a fungal infection, or sometimes a skin biopsy can help rule out other causes of localized or scarring hair loss.

TREATMENT AND SUPPORT

What support is available?

The appropriate approach depends, among other things, on age, duration, and extent of hair loss. A doctor can discuss medical options that influence the immune response or inflammation. In cases of extensive hair loss, different treatments may be considered than for a single small patch.

Camouflage, wigs or hairpieces, protecting exposed skin, and emotional support can help in everyday life. Food supplements do not treat the autoimmune cause; they are aimed only at overall hair condition or a confirmed deficiency.

Important to know

Alopecia areata is not contagious and is not caused by poor hygiene or improper hair care. Have sudden or expanding bald patches professionally assessed, especially if eyebrows, eyelashes, or nails also change, the scalp becomes inflamed, or the cause is uncertain.

Questions about alopecia areata

No. Alopecia areata is an autoimmune disorder and cannot be transmitted from person to person. The condition is also not caused by poor hygiene or improper hair care.

Regrowth is possible because the hair follicles usually do not become scarred. The hair may initially grow back finer or lighter. When and how fully it will regrow cannot be reliably predicted.

Yes. Even after the hair has grown back, bald patches may develop again later. The course varies from person to person and may consist of a single episode, recurring patches, or more extensive hair loss.

Stress is not the only or proven direct cause. Alopecia areata is an autoimmune condition. Stress may be present in some people around the onset or a new episode, but often no clear trigger can be identified.

Yes. Some people develop small pits, ridges, or a rougher nail surface. Nail changes do not occur in everyone, but they can provide an additional clue during professional assessment.

Have sudden, spreading, or recurring bald patches assessed. Do the same if eyebrows or eyelashes fall out, nails change, the scalp is red, painful, or flaky, or if the cause remains unclear.

FIND WHAT SUITS YOU

What support is suitable for patchy hair loss?

The TRIX Hair Check helps you better understand your situation and shows which TRIX Basic products may be suitable for you. The Hair Check does not provide a medical diagnosis. TRIX Basic Gamma supports the normal condition of the hair but does not treat the autoimmune cause of alopecia areata.

Start the Hair Check View TRIX Basic Gamma