Can Cortisone Shots Cause Hair Loss?

Cortisone shots can cause hair loss near the injection site, though the effect is almost always localized and temporary. The mechanism involves the steroid’s ability to constrict blood vessels and suppress the activity of cells that build skin and hair, and certain steroid formulations carry substantially more risk than others. What makes this topic especially confusing is that cortisone injections are also a frontline treatment for certain types of hair loss, so the same class of drug can both cause and treat the problem depending on how, where, and why it is used.

How a Cortisone Shot Damages Hair Follicles

When a corticosteroid is injected into tissue, it does not simply dissolve and disappear. Some formulations deposit tiny crystals that linger at the injection site for weeks or months. These crystals trigger intense vasoconstriction, meaning the small blood vessels that supply skin and hair follicles in the area clamp down. With reduced blood flow, the tissue gets less oxygen and fewer nutrients. At the same time, the steroid directly suppresses keratinocyte proliferation in the epidermis, which slows skin renewal and hair growth. It also inhibits the production of type I and type III collagen and reduces hyaluronic acid in the surrounding tissue, leading to dermal and epidermal atrophy. The combined result is thinner skin and shrunken sebaceous glands, and hair follicles in the zone of effect can temporarily stop producing hair or produce only fine, wispy strands.¹

This atrophy tends to be local. A cortisone shot in the knee, the shoulder, or the scalp affects a patch of tissue roughly around the injection path. You are not going to develop widespread hair thinning across your entire head from a single joint injection. But if the injection site happens to be near a hair-bearing area, or if steroid migrates along tissue planes toward the skin surface, the hair in that region can be affected.

Why Triamcinolone Carries the Most Risk

Not all injectable corticosteroids behave the same way. The four most commonly used are triamcinolone, methylprednisolone, betamethasone, and dexamethasone. What distinguishes them is how easily they dissolve in tissue fluid. Triamcinolone acetonide is the least soluble of the group and forms microcrystalline deposits that persist at the injection site for a long time. That persistence is exactly why it works so well for conditions that need a sustained anti-inflammatory effect, but it is also why it does the most damage to surrounding soft tissue.²

Dexamethasone sits at the other end of the spectrum. It dissolves freely in water, does not form crystals, and is absorbed quickly, so its anti-inflammatory burst is shorter-lived but it causes far less atrophy. Betamethasone falls in between: some formulations contain both a quickly absorbed salt and a slower-dissolving ester, which gives them a moderate duration. Methylprednisolone behaves somewhat like triamcinolone in forming microcrystals, though clinical studies show a lower incidence of soft tissue damage. The general rule is that lower solubility means longer action and more tissue atrophy, and higher solubility means shorter action and less risk of damage.³

Because triamcinolone is the most widely used injectable steroid in orthopedic, pain management, and dermatology settings, it is also the most frequently implicated in reports of localized hair loss and skin thinning after injections. Some researchers have recommended alternative preparations like methylprednisolone or betamethasone for injection sites where tissue atrophy would be especially noticeable or problematic, such as nerve blocks near the scalp.⁴

The Paradox of Treating Hair Loss With Cortisone

Here is where the topic gets counterintuitive. While cortisone shots can cause hair loss as a side effect, they are also a standard treatment for alopecia areata, an autoimmune condition where the body’s immune cells attack hair follicles and cause patchy baldness. Intralesional corticosteroid injections, meaning shots delivered directly into bald patches on the scalp, are considered a first-line treatment for localized patchy hair loss from this disease.⁵

The logic is straightforward: in alopecia areata, the problem is an overactive immune response. Corticosteroids shut down local inflammation, allowing the suppressed follicles to restart hair production. The treatment works quite well in many patients with limited disease, but it comes with a real trade-off. Common side effects include pain at the injection site, skin atrophy and denting where the needle went in, changes in skin pigmentation, and occasionally folliculitis. In one study, about a quarter of patients experienced recurrent hair loss after initially regrowing hair by the twelve-week mark.⁶

So a person receiving cortisone shots for alopecia areata might see both the benefit (regrowth in the bald patches) and the cost (thinning or denting in the injected skin). The net effect is usually positive for the hair, but the side effects can create cosmetic concerns of their own, especially visible denting of the scalp, which can be alarming even when the hair itself improves.

Injection Depth and Location Matter

One of the biggest determinants of whether a cortisone shot affects nearby hair is how superficially it is placed. Steroid deposited just under the skin is far more likely to cause visible atrophy and hair thinning than steroid injected deep into a joint capsule or a muscle belly. This is partly because deeper tissue has a richer blood supply that clears the drug more quickly, and partly because the drug has more tissue to migrate through before reaching hair follicles at the skin surface.

This matters for specific clinical scenarios. Greater occipital nerve blocks, which are cortisone injections given at the back of the head to treat certain headaches, have a well-documented association with localized hair loss and skin atrophy precisely because the injection is relatively shallow and close to hair-bearing skin.⁴ Shoulder or knee injections, by contrast, are deeper and rarely produce noticeable hair loss, though skin thinning directly over the injection site is still possible if the steroid tracks back along the needle path toward the surface.

The concentration and volume of the injection also play a role. A high-dose, high-volume shot deposits more steroid crystal in a given area, increasing the risk of local tissue damage. Clinicians can minimize this risk by using the lowest effective dose, selecting an appropriate needle gauge, and, where available, using ultrasound guidance to ensure the steroid reaches the intended target rather than pooling in superficial tissue.⁷

What Recovery Looks Like

The good news is that cortisone-induced hair loss and skin atrophy are almost always reversible. Once the steroid is fully absorbed and cleared from the tissue, the local blood supply returns to normal, collagen production restarts, and hair follicles reactivate. The timeline varies depending on which steroid was used and how much was injected, but most cases resolve within a few months without any intervention.

For skin atrophy that persists longer than expected, there is some evidence that normal saline infiltration can speed recovery. In a small series of patients with persistent cutaneous atrophy after corticosteroid injections, repeated saline injections into the affected area led to complete resolution of the atrophy and restoration of the skin’s normal contour within four to eight weeks. Patients received three to six weekly treatments, and all reported full satisfaction with the result.⁸

This approach is thought to work by physically dispersing remaining steroid crystals and stimulating local tissue repair. It is a relatively low-risk option when atrophy is cosmetically bothersome and is not resolving on its own. That said, the published evidence comes from case series rather than large trials, so it is not yet a standard recommendation everywhere.

How to Reduce the Risk Before Your Next Shot

If you are about to receive a cortisone injection and are concerned about local side effects like hair loss or skin thinning, there are several things worth discussing with your clinician:

Steroid choice: More soluble formulations like dexamethasone or certain betamethasone preparations clear faster and carry less atrophy risk than triamcinolone acetonide, though they may not last as long therapeutically.
Dose and volume: Using the lowest effective concentration and volume minimizes the crystal load deposited in tissue.
Injection technique: A 23- to 27-gauge needle helps ensure precise delivery. Ultrasound guidance, where available, lets the clinician see exactly where the steroid is going and avoid superficial deposition.
Injection site awareness: For injections near hair-bearing skin, such as the scalp, temple, or back of the head, the risk-benefit calculation may shift in favor of a shorter-acting steroid or a non-steroidal alternative altogether.

These precautions apply to all cortisone injection settings, not just scalp injections. Skin atrophy and depigmentation can occur wherever the shot is placed, but they tend to be most noticeable and most distressing in cosmetically visible areas.⁷

When the Hair Loss Is Not From the Shot Itself

It is worth distinguishing cortisone-induced hair loss from other types of hair loss that might coincidentally follow an injection. Telogen effluvium, the diffuse shedding that can happen after a physical stressor like surgery, illness, or even the pain condition that led to the cortisone shot in the first place, often shows up two to three months after the triggering event. A person who gets a cortisone injection for severe back pain and notices hair thinning two months later might reasonably blame the shot, but the underlying pain, the stress of dealing with a chronic condition, or a concurrent medication could be the actual cause.

Cortisone-induced hair loss has a distinctive profile that helps tell it apart. It is localized to the area near the injection rather than spread across the entire scalp. It is often accompanied by visible skin changes at the site, such as thinning, a sunken or depressed appearance, or lighter pigmentation. And it tends to track the timeline of the steroid’s duration, appearing within weeks of the injection and resolving within months. Diffuse thinning across the whole head, by contrast, points away from a local steroid effect and toward a systemic cause.

People with alopecia areata face an additional layer of complexity. If you are receiving cortisone injections to treat patchy hair loss and notice a new bald patch, it can be genuinely difficult to know whether you are seeing a side effect of the treatment or a new manifestation of the underlying disease. Dermatologists typically look at the pattern: disease-related patches tend to be smooth and well-defined, while steroid-induced atrophy has a more depressed, sometimes dimpled appearance with visible skin changes. Follow-up appointments after treatment courses are important for exactly this reason.

Repeated Injections and Cumulative Effects

A single cortisone shot in a joint or tendon is unlikely to produce dramatic hair loss. The concern grows with repeated injections, particularly when they are given at the same site over months or years. Each injection deposits a new load of steroid, and if the tissue has not fully recovered from the previous round, the cumulative effect on collagen, blood supply, and follicle activity can be substantially greater than any single shot would produce.

This is one reason many clinicians limit the frequency of cortisone injections to a given area, typically spacing them at least three months apart and capping the total number in a year. The tissue needs time to recover between exposures. When repeated injections are necessary, switching to a more soluble steroid or reducing the dose can help limit cumulative damage.³

For people who receive regular cortisone injections as part of chronic pain management, keeping a personal log of injection dates, sites, formulations, and any side effects can be surprisingly useful. Patterns that are invisible from appointment to appointment become obvious in a log: maybe every triamcinolone shot at a particular site causes noticeable thinning, while a switch to methylprednisolone at the same site does not. That kind of data gives your clinician something concrete to work with when tailoring future treatments.

Skin Changes Beyond Hair Loss

Hair loss from cortisone shots does not happen in isolation. It is part of a broader pattern of local tissue atrophy that can include several visible changes. Skin thinning makes the area look papery or translucent. Hypopigmentation leaves a lighter-colored patch, which is especially noticeable on darker skin tones. Telangiectasias, small dilated blood vessels near the surface, can appear as fine red or purple lines. And denting, where the skin surface becomes visibly depressed, can persist even after the skin texture itself has improved.⁶

These changes share the same underlying mechanism as the hair loss: the steroid suppresses the cells responsible for maintaining skin structure. Just as follicles temporarily shut down, so does the collagen scaffold that keeps skin thick and resilient. The clinical picture often involves several of these features together, and their presence near an injection site is a strong clue that the cortisone, rather than some other factor, is responsible.

The reassuring part is that these changes follow the same recovery trajectory as the hair loss. Once the steroid clears, the body’s repair processes gradually restore normal skin thickness, pigmentation, and vasculature. Hair regrowth typically follows once the skin has recovered enough to support healthy follicle function again. For most people, the entire episode is a temporary cosmetic nuisance rather than a permanent problem, though the months of recovery can feel long when the affected area is somewhere visible.

1
PubMed Central. Alopecia and cutaneous atrophy due to occipital nerve block containing steroids
2
PubMed Central. Delineating Injectable Triamcinolone-Induced Cutaneous Atrophy and Therapeutic Options in 24 Patients—A Retrospective Study
3
Journal of Hand Surgery. Complications of Corticosteroid Injections of the Upper Extremity: Soft Tissue Atrophy and Skin Hypopigmentation
4
PubMed. Cutaneous atrophy and alopecia after greater occipital nerve injection using triamcinolone
5
BMJ. Management of alopecia areata
6
PubMed Central. Local Corticosteroids for Alopecia Areata: A Narrative Review
7
PubMed Central. Cutaneous Atrophy Following Corticosteroid Injections for Tendonitis: Report of Two Cases
8
PubMed. Treatment of local, persistent cutaneous atrophy following corticosteroid injection with normal saline infiltration