Patchy hair loss: types, causes and treatments

Summary

One area of the scalp thins out sharply while the rest of the hair stays exactly as it was. There is a common name for that picture: patchy hair loss. It describes what you can see, and nothing more. Two patches of identical shape and size may come from an autoimmune condition, a fungus, months of pulling at the roots, a habit of plucking, or an old scar. What happens next is not remotely comparable from one case to the other.

The outlook does not depend on how much bare skin there is. It depends on the state of the follicle underneath. Alive, and regrowth is still on the table. Destroyed, and the loss is permanent in that spot, with a transplant the only way to put hair back there. This page runs through the commonest forms, the clues that separate them, and what each one can realistically deliver. To place your own situation within the wider picture of hair loss, the general guide to alopecia is the place to start.

What patchy hair loss actually means

Alopecia is the medical term for abnormal hair loss, partial or total, temporary or permanent. We call it patchy, or localised, when it carves out one or more clearly bounded areas, with a visible border between the hair that remains and bare skin. That is the opposite of diffuse hair loss, where density drops everywhere at once and no frontier ever appears.

The distinction already narrows things down a great deal. Thinning across the whole head suggests a general cause: a deficiency, the thyroid, a shock, a drug. A bounded patch points instead to what is going on in that one spot, inside the hair follicles of the area, the tiny pockets in the skin that each grow a single hair.

Localised does not mean harmless, and it does not mean serious either. Some patches fill back in on their own. Others are the mark of destruction that will not reverse.

The types of patchy hair loss and who they affect

Men, women, children: nobody is exempt, and the various forms do not distribute themselves at random across ages or styling habits.

Two open hands covered with long fallen hairs

Scarring alopecia

Close-up of a scar crossing the scalp where no hair grows back

Uncommon, and the form with the heaviest consequences. Chronic inflammation destroys the follicle and replaces it with fibrous tissue. The skin turns smooth, slightly shiny, with no visible pore where a hair should emerge. The trigger may be an accident, a burn, an old infection, an autoimmune disease such as lupus, or lichen planopilaris.

Nothing here brings back what has gone. The only worthwhile aim is to shut down the inflammation so the patch stops spreading. The features of scarring alopecia and the way it is managed are set out on its own page.

Alopecia areata

Several round, completely bare patches on a brown-haired scalp

This is the classic reason a round patch appears within a few days. The immune system turns on the follicles in one area, growth stops dead, but the structure itself survives. Hence the key point: regrowth is possible.

The patch is round or oval with clean edges, sitting on scalp that looks entirely normal, no redness and no scaling. Around the rim of an active patch you often find short broken hairs, thicker at the tip than at the base, described as exclamation mark hairs. With a single small patch, spontaneous regrowth commonly happens within 6 to 12 months. Extensive forms, and those running as a band across the nape, carry a poorer outlook: the position of the patches on its own shifts the odds of regrowth noticeably.

One rule with no exceptions: alopecia areata is never treated with a transplant. Grafting onto active autoimmune ground means placing follicles into a zone the immune system carries on attacking. Treatment options are covered on the page devoted to alopecia areata.

Traction alopecia

Woman with short hair whose front hairline has receded above the temples

This one comes from repeated mechanical pull on the root: tight styles, braids, extensions, hard-pulled buns, a helmet worn for hours in the same spot. The loss draws itself wherever the tension is greatest, along the front hairline, at the temples, around the ears. The most useful sign is a surviving fringe of fine hairs right at the edge of the forehead while the strip just behind it is bare.

Caught early it reverses: take the tension away and the hair comes back. Kept up for years, traction ends by turning the area into scarring alopecia, and at that point nothing regrows at all. The page on traction alopecia explains how to slow the process down.

Trichotillomania

The hair did not fall, it was pulled out, frequently without the person being fully aware of it. The patch has irregular outlines, never a clean circle, and it holds hairs broken at very different lengths, something no other form produces. It tends to sit on the side of the dominant hand.

Management is psychological before anything else, usually behavioural therapy: treating the skin without addressing the gesture achieves nothing. The markers for recognising trichotillomania are gathered on its page.

Ringworm and other scalp infections

Ringworm of the scalp, or tinea capitis, is a fungal infection. It produces a scaly patch, sometimes red, with hairs snapped off flush against the skin. It itches. Contagious and common in children, it is treated with an oral antifungal prescribed once a sample has been taken. Mistaken for alopecia areata, it receives corticosteroids, which make it worse. A patch that itches should therefore always raise the question of an infectious or inflammatory cause, as our article on an itchy scalp with hair loss points out.

What disturbs hair in one specific area

Genetic factors

Gloved practitioner examining a lock of hair with forceps in front of a DNA double helix

Androgenetic alopecia is not a patchy alopecia, yet it is localised in the strict sense: it hits predictable zones, the temporal recessions, the frontal line, the crown, while sparing the low band at the back. Under the influence of DHT, a hormone derived from testosterone, susceptible follicles turn out finer and finer hairs. It is by far the commonest form of all, and a transplant is its most durable treatment.

Environmental and mechanical factors

Man in shirt and tie shouting among sheets of paper flying around an office

Repeated pulling, friction, harsh products, chemical burns, tobacco, heavy stress, certain medicines: any of these can leave one area poorer than the rest. The mechanical cause is much the most widespread of them, and the easiest to correct when it is spotted early.

Autoimmune and inflammatory factors

Lupus, thyroiditis, scalp psoriasis, lichen: inflammation aimed at the skin or at the follicle creates patches whose appearance varies with the disease behind them. Redness, scaling around the hairs, a burning feeling or pain should never be brushed aside. They often announce scarring damage in the making.

The clues that point the way before any test

Three things guide a doctor’s eye: how the skin looks inside the patch, how the border behaves, and the state of the hairs at its edge.

Perfectly normal skin, a crisp border, short tapered broken hairs: alopecia areata is likely. Scaling, redness, hairs snapped at scalp level in a child: rule out ringworm first. Smooth, varnished skin with no pore in sight: scarring damage. Mismatched lengths inside an angular patch: pulling.

None of that replaces examination with a dermatoscope, the illuminated magnifier that enlarges the scalp and shows detail the naked eye misses. Trichoscopy reliably separates ringworm from alopecia areata in children, two pictures that look very much alike and whose treatments are opposites. Where doubt remains, a small biopsy settles it. This step governs everything that follows, because the question it answers is a simple one: is the follicle alive or lost?

Which treatments work for patchy hair loss

The right treatment follows the diagnosis, never the look of the patch.

Balding man holding his head in front of a spilled bottle and tablets scattered on a table

Treat the cause first

Gloved practitioner giving an injection right at the surface of a patient's scalp

There is no treatment for patchy hair loss as such, only treatments for whatever is causing it. Ringworm calls for an antifungal. Limited alopecia areata often responds to corticosteroids applied to the skin or injected into the patch, while severe adult forms now fall to JAK inhibitors, a class of drug that blocks the immune signal behind the attack, ritlecitinib among them. Traction alopecia asks for the tension to be released. Trichotillomania asks for support with the behaviour itself.

The earlier this starts, the better. A patch that has been sitting there for years leaves far less room to work with than one that appeared three weeks ago.

When a transplant comes into play

Dr Cinik preparing a local anaesthetic on the head of a seated patient

A transplant does not stand in for medical treatment. It comes afterwards, and only in one precise configuration. The follicle has to be permanently lost, the situation stable for at least several months, and a healthy donor area still available at the back of the head.

In practice that covers androgenetic alopecia, the old aftermath of traction alopecia, and scalp scars left by an accident or an operation. Over scarred ground the blood supply is poorer, so the surgeon works at a cautious density and often plans two sessions spaced apart rather than a single very dense pass.

It does not cover alopecia areata, nor inflammation that is still active, nor untreated trichotillomania. Grafting in those three situations amounts to losing the grafts.

Frontal area of a patient just after graft implantation, red dots lined up across the whole surface

Which category you fall into is the question that remains, and no photograph answers it on its own. Our page on whether you are suitable for a hair transplant lists the criteria we check, and Dr Cinik’s team reviews every hair transplant Turkey enquiry from photographs before any surgical plan is put forward.

Sources

Hébert, V. (2026). Description et diagnostic des différentes formes cliniques de la pelade. Dermato Mag, 14(3), 9-13. https://doi.org/10.1684/dmg.2026.893

Lee, S., Kim, B. J., Lee, C.-H., et Lee, W.-S. (2019). Topographic phenotypes of alopecia areata and development of a prognostic prediction model and grading system. JAMA Dermatology, 155(5), 564-571. https://doi.org/10.1001/jamadermatol.2018.5894

Amer, M., Helmy, A., et Amer, A. (2016). Trichoscopy as a useful method to differentiate tinea capitis from alopecia areata in children at Zagazig University Hospitals. International Journal of Dermatology, 56(1), 116-120. https://doi.org/10.1111/ijd.13217

Billero, V., et Miteva, M. (2018). Traction alopecia: the root of the problem. Clinical, Cosmetic and Investigational Dermatology, 11, 149-159. https://doi.org/10.2147/ccid.s137296