Why Is the Hair on My Temples Completely Gone? (Temporal Triangular Alopecia)

Hair that appears completely absent from one temple can be unsettling, especially when the skin looks smooth and there is no obvious irritation. One possible explanation is temporal triangular alopecia, a localized form of non-scarring hair loss that usually affects the front or side of the scalp near the temple.

Despite its older name, congenital triangular alopecia, the patch may not become noticeable until childhood or adulthood. It often remains stable rather than spreading, but a dermatologist should evaluate localized hair loss because several conditions can look similar at first.

Quick answer

• Temporal triangular alopecia usually creates a well-defined patch of thinner or absent hair near one temple.
• The patch may be triangular, oval, or irregular rather than perfectly triangle-shaped.
• It is considered non-scarring, meaning the follicle openings are generally still present.
• The area often contains very fine, short hairs that are difficult to see without magnification.
• A dermatologist can distinguish it from alopecia areata, traction-related loss, pattern hair loss, and scarring conditions.

What is temporal triangular alopecia?

Temporal triangular alopecia is an uncommon pattern of localized hair loss on the frontotemporal scalp. It most often affects one side, although both temples can occasionally be involved. The surrounding scalp usually looks normal, without scaling, redness, crusting, or visible scar tissue.

The name can be misleading. The patch is not always triangular, and it is not always present at birth. Many people first notice it when hairstyles change, the surrounding hair becomes thicker, or gradual thinning elsewhere makes the contrast more visible.

In the affected area, normal thick terminal hairs are often replaced by finer, shorter vellus-like hairs. These hairs can be so light and delicate that the temple appears completely bare from a normal viewing distance.

Why does this type of temple hair loss happen?

The exact cause is not fully understood. Temporal triangular alopecia is generally considered a developmental difference in how hair follicles mature within a small, defined area of the scalp. Most cases occur without a clear family history, although familial cases have been reported.

Unlike traction alopecia, it is not usually caused by tight hairstyles. It is also different from alopecia areata, an autoimmune form of hair loss that often appears suddenly as a smooth round or oval patch.

What else can cause hair to disappear at the temples?

A dermatologist may consider several possibilities before identifying the cause:

• Alopecia areata: This can cause sudden, smooth patches of hair loss and may change or expand over time.
• Traction alopecia: Repeated tension from tight braids, ponytails, extensions, wigs, or head coverings may gradually thin the hairline and temples.
• Pattern hair loss: Genetic hair loss can produce progressive thinning or recession around the temples.
• Frontal fibrosing alopecia: This scarring condition can cause a receding frontal hairline and may also affect the eyebrows.
• Hair pulling: Repeated pulling or twisting may leave hairs of different lengths and patches with irregular borders.
• Scalp inflammation or infection: Scaling, tenderness, pustules, crusting, or broken hairs can point toward another condition.

How a dermatologist evaluates a smooth temple patch

The evaluation usually begins with questions about when the patch appeared, whether it has changed, and whether there are symptoms such as itching, burning, tenderness, or scaling. Your dermatologist may also ask about hairstyles, hair-care practices, medications, family history, and hair loss elsewhere on the body.

A handheld magnifying device called a dermatoscope may help reveal follicular openings and the short, fine hairs commonly seen in temporal triangular alopecia. If the appearance is not typical or there are signs of inflammation or scarring, additional testing or a small scalp biopsy may be considered.

What can you do at home?

A stable, symptom-free patch does not usually require urgent home treatment. Gentle hair care can still help protect the surrounding hair and avoid adding traction or breakage.

• Avoid repeatedly pulling the temple area into tight ponytails, braids, buns, or extensions.
• Limit harsh chemical processing and excessive heat around fragile hairline areas.
• Take clear photos under similar lighting every few months if you are unsure whether the patch is changing.
• Do not repeatedly scrape, massage, or apply irritating products in an attempt to stimulate growth.
• Avoid starting supplements or medicated scalp products without understanding the cause of the hair loss.

Professional options

If temporal triangular alopecia is confirmed and the area is stable, observation may be reasonable. Some people choose cosmetic camouflage, strategic hairstyling, scalp micropigmentation, or consultation about hair restoration procedures. Medical approaches may be discussed in selected cases, but results can vary and the correct diagnosis matters before treatment is considered.

At Waverly DermSpa, we offer PRFM for Hair Loss and can help you understand whether it may be appropriate. A dermatologist can also explain when a localized patch is unlikely to respond to nonsurgical hair-growth treatments and when another approach may make more sense.

When should you see a dermatologist?

Schedule an evaluation if the patch is new, expanding, symptomatic, or accompanied by other changes. Earlier assessment is especially important when you notice:

• Rapid or ongoing hair loss
• Redness, scaling, crusting, pustules, or drainage
• Burning, itching, pain, or scalp tenderness
• Shiny skin or loss of visible follicle openings
• Broken hairs or signs of repeated pulling
• Eyebrow, eyelash, beard, or body-hair loss
• Several new patches rather than one stable temple area

Frequently asked questions

Is temporal triangular alopecia present from birth?

Not always. Although it is sometimes called congenital triangular alopecia, the patch may become noticeable later in childhood or adulthood.

Does the patch always look triangular?

No. It may appear triangular, oval, lance-shaped, or irregular. Its location and the presence of very fine hairs can be more helpful than the exact shape.

Can temporal triangular alopecia spread?

It is often stable and localized. A patch that is enlarging, multiplying, or changing should be reevaluated because another form of hair loss may be responsible.

Is it the same as alopecia areata?

No. Alopecia areata is an autoimmune condition that can cause sudden patchy hair loss. The two conditions may look similar without a close scalp examination.

Will vitamins regrow the missing temple hair?

Supplements are unlikely to change a localized developmental hair pattern unless a separate nutritional deficiency is present. Unnecessary supplements can also cause side effects or interfere with medications.

Can hair transplantation be considered?

Hair transplantation may be discussed for a stable, well-defined area after the diagnosis has been confirmed. Candidacy, expected density, cost, and procedural risks vary from person to person.

This article is for educational purposes and is not medical advice. For diagnosis and personalized treatment, please book an appointment with a board-certified dermatologist.

Sources & further reading

• DermNet – Temporal Triangular Alopecia
• American Academy of Dermatology (AAD) – Hair Loss: Diagnosis and Treatment
• American Academy of Dermatology (AAD) – Alopecia Areata Overview