6 Years Later: Long-Term Hair Loss from COVID-19

Did You Have COVID-19? Are You Shedding Excessively? It’s Not Your Imagination.

You recovered from COVID-19, start feeling like yourself again, and then—weeks or even months, possibly years, later—you notice something unsettling. There is more hair in the shower drain. More wrapped around your brush. More coming loose when you shampoo. Your ponytail may feel smaller, your part may look wider, or you may suddenly be able to see more scalp than you remember.

If this sounds familiar, you are not imagining it. Dermatologists have now documented excessive hair shedding after COVID-19 around the world. In most cases, the culprit is telogen effluvium, a temporary form of diffuse hair shedding that can occur after the body experiences a significant physical or emotional stressor. COVID-19 isn't the only illness capable of causing it, but the pandemic brought the condition into much greater public awareness. The American Academy of Dermatology (AAD) reports that studies have found roughly 20% of people who had COVID-19 later developed temporary excessive shedding, although estimates vary considerably between studies. (aad.org)

There is one especially confusing part: the shedding usually doesn't happen while you're sick. It often begins two to three months later. Cleveland Clinic dermatologist Shilpi Khetarpal, MD, puts it simply: “Any major shedding you see today is the result of what happened three months ago.” (health.clevelandclinic.org) That delay is one of the reasons clients are often caught completely off guard.

What Exactly Is Telogen Effluvium?

Hair doesn't grow continuously. Every follicle moves independently through a repeating cycle of growth, transition, rest and eventual shedding. The longest phase is anagen, when hair is actively growing. Most scalp hairs are normally in this phase at any given moment. A much smaller percentage move through the short catagen, or transitional, phase before entering telogen, the resting phase. At the end of telogen, the old hair is released as a new hair begins growing beneath it.

On a healthy scalp, roughly 85–95% of follicles are normally growing, with most of the remainder resting. Losing approximately 50 to 150 hairs over the course of a day can therefore be completely normal. (pubmed.ncbi.nlm.nih.gov)

Telogen effluvium disrupts that balance. After a major physiological stressor, an unusually large number of follicles can shift out of their growth phase and into their resting phase at roughly the same time. Those hairs don't immediately fall out. They remain in place for weeks before eventually releasing together, which is why the shedding can seem to arrive out of nowhere. Dr. Khetarpal explains that after a major illness, shock or stressful event, “up to 50% of hairs can be pushed into the shedding phase.” (health.clevelandclinic.org) Suddenly, what would normally be a relatively inconspicuous daily process becomes impossible to miss.

Why Can COVID-19 Trigger Hair Shedding?

COVID-19 is not unique in its ability to trigger telogen effluvium. Influenza, pneumonia, high fevers, major surgery and other significant illnesses have been associated with the condition for decades. What makes COVID complicated is that several potential triggers can happen simultaneously.

The infection itself places physiological stress on the body. Fever and systemic inflammation may disrupt the normal hair-growth cycle. A difficult recovery may be accompanied by changes in appetite, weight loss, nutritional deficiencies, disrupted sleep and significant emotional stress—all of which can create additional stress on the hair follicle. (health.clevelandclinic.org)

Researchers have also proposed that inflammatory cytokines released during SARS-CoV-2 infection may contribute to the disruption of follicle cycling, although the exact biological mechanism is still being studied. Reviews of post-COVID telogen effluvium have explored inflammation, oxidative stress, immune responses and illness-related hypoxia as possible contributors rather than identifying one single cause. (pubmed.ncbi.nlm.nih.gov)

In other words, it may not be simply "COVID attacking the hair." It is more likely the hair follicle responding to the considerable physiological disruption surrounding an infection.

You Don't Have to Have Had Severe COVID

One of the most important findings to emerge from the research is that significant shedding is not limited to people who were hospitalized or critically ill. The AAD notes that many people who develop post-COVID hair shedding had relatively mild COVID symptoms. A systematic review examining reported cases also found no clear relationship between the severity of the infection and the extent of subsequent hair loss. (aad.org)

So having had a "mild" case doesn't necessarily rule it out. Likewise, two people can experience what appears to be a very similar illness and have completely different hair responses afterward.

Why Does the Hair Loss Start Months Later?

This is perhaps the most important part to understand. The follicles affected by telogen effluvium do not immediately release their hairs when the triggering event occurs. They first transition into a resting state. Only later does shedding become visible.

Classic telogen effluvium frequently appears roughly two to three months after a trigger. Research specifically examining post-COVID cases has found a similar—and sometimes slightly shorter—timeline. One systematic review of 465 people with post-COVID acute telogen effluvium found that shedding began an average of about 74 days after the onset of COVID symptoms. Another review found a median onset of approximately two months. (pubmed.ncbi.nlm.nih.gov)

That means someone who had COVID in January could feel completely recovered by February and suddenly begin experiencing dramatic shedding in March. By that point, COVID may be the last thing on their mind.

What Does Telogen Effluvium Look Like?

Unlike some types of alopecia, telogen effluvium is usually diffuse. Instead of one bald spot appearing, shedding occurs across the scalp. Clients often describe handfuls of hair during shampooing, a brush filling faster than usual, hair accumulating on clothing and furniture, or an overall decrease in volume.

The scalp itself usually looks normal. There generally isn't a rash, significant redness, scarring or a sharply defined bald patch. And although density may decrease, the follicles themselves have not been permanently destroyed. That distinction matters. With telogen effluvium, the problem is usually that too many follicles are cycling at the same time—not that those follicles have lost their ability to produce hair.

The Encouraging Part: The Hair Usually Comes Back

Seeing large amounts of hair fall out can understandably be frightening. But acute telogen effluvium is considered a non-scarring and usually reversible form of hair loss. In a systematic review of reported post-COVID hair-loss cases, the median recovery time was approximately five months, and 95% of the documented cases with available outcome data ultimately resolved. (pubmed.ncbi.nlm.nih.gov)

The AAD similarly notes that post-illness shedding commonly lasts approximately three to six months, with new growth beginning as the shedding settles. Many people regain their previous density over the following months. (aad.org)

The frustrating part is that hair grows slowly. Even when the follicle has returned to its normal growth cycle, a new hair has to grow from the scalp all the way through the existing length before overall density feels normal again. For someone with shoulder-length or longer hair, that visual recovery can take considerably longer than the shedding itself. You may notice short new hairs along the hairline and part before you notice your ponytail becoming fuller. Those small hairs can actually be an encouraging sign.

COVID Isn't the Only Possible Cause

Timing can provide an important clue, but not every episode of excessive shedding after COVID should automatically be attributed to COVID. Telogen effluvium has many well-established triggers, including high fever, major surgery, childbirth, rapid weight loss (read more about our coverage on GLP-1 related hair loss), substantial calorie restriction, low protein intake, significant emotional stress, thyroid disorders, iron deficiency and certain medications. (ncbi.nlm.nih.gov)

Sometimes more than one trigger is happening at once. Someone may have had COVID, lost weight while sick, changed medications, slept poorly for several weeks and experienced significant emotional stress. The follicles don't necessarily distinguish among those events. This is one reason persistent or unusually severe hair loss deserves medical evaluation rather than self-diagnosis.

What About Iron, Vitamin D and Other Nutrients?

Nutrition has become an especially confusing part of the conversation around hair loss because there is no shortage of supplements promising faster growth. There is evidence that certain nutritional deficiencies can contribute to diffuse shedding. A 2026 systematic review and meta-analysis found significantly lower ferritin and vitamin D levels among people with telogen effluvium compared with controls, although nutritional status is only one possible contributor and the studies showed considerable variation. (pubmed.ncbi.nlm.nih.gov)

A dermatologist may therefore recommend blood work based on your history and symptoms. Testing can include a complete blood count, iron or ferritin levels, thyroid function and, in some cases, vitamin D or other nutritional markers. (pubmed.ncbi.nlm.nih.gov)

The important word here is testing. Taking large doses of vitamins "just in case" isn't necessarily helpful. Biotin, in particular, has become almost synonymous with hair-growth supplements. Yet true biotin deficiency is considered rare, and one study of patients with telogen effluvium found no significant difference in biotin levels compared with healthy controls. (pubmed.ncbi.nlm.nih.gov)

The American Academy of Dermatology advises taking biotin, iron or zinc supplements when testing actually demonstrates a deficiency rather than automatically taking them for hair loss. High-dose biotin can also interfere with certain laboratory tests, including some thyroid and cardiac tests. (aad.org) More isn't always better.

Is There a Treatment?

For uncomplicated acute telogen effluvium, the most important "treatment" is often time and addressing whatever caused the disruption in the first place. Once the trigger has resolved, the follicles can gradually return to their normal cycle.

That may mean recovering fully from an illness, correcting a documented nutritional deficiency, eating adequate calories and protein, managing an underlying thyroid disorder or reviewing medications with a physician. Topical minoxidil is sometimes used for hair loss and may be recommended in certain circumstances, but whether it makes sense depends on the diagnosis and the individual. It should not be treated as a universal solution for every person experiencing temporary shedding. Cleveland Clinic notes that many cases of telogen effluvium resolve without treatment. (my.clevelandclinic.org)

This is an area where a dermatologist—not your stylist, social media or a supplement label—should make the medical call.

When Should You See a Dermatologist?

Temporary diffuse shedding after an illness can fit the pattern of telogen effluvium, but hair loss has many causes. Consider seeing a board-certified dermatologist if you notice clearly defined bald or patchy areas, significant scalp redness, itching, burning, pain, scaling or sores; loss of eyebrow or body hair; progressive widening of the part or patterned thinning rather than primarily shedding; shedding that continues beyond roughly six months; no signs of regrowth over time; or hair loss that is severe enough that you simply aren't sure what is happening.

Dermatologists can distinguish telogen effluvium from conditions such as androgenetic alopecia, alopecia areata, inflammatory scalp diseases and other forms of hair loss that may require treatment. (aad.org)

There is another reason evaluation can be helpful: a bout of telogen effluvium can sometimes make preexisting pattern hair loss more noticeable. Losing density rapidly may reveal thinning that was developing gradually beforehand.

What Can Your Hairdresser Do?

We can't diagnose or medically treat telogen effluvium—and a reputable hairdresser shouldn't pretend to. But we can help you get through it.

At Oscar Giovanni Salon & Spa, we regularly work with clients experiencing changes in density from postpartum shedding, illness, hormonal changes, medications, stress and other temporary disruptions. The goal during this period isn't to promise a miracle cure. It's to protect the hair you have, make reduced density less visually noticeable and help you feel like yourself while your hair recovers.

Sometimes that means changing the shape of the haircut. Long, heavily layered hair can emphasize thin ends when density drops, whereas a slightly shorter or fuller perimeter may create the appearance of considerably more hair. Sometimes it means reconsidering color placement. Strategic highlights and dimensional color can create visual movement without requiring aggressive lightening throughout fragile hair. And sometimes the smallest styling adjustments make the biggest difference: moving the part slightly, adding root lift, choosing softer face-framing pieces or using a texturizing product that creates fullness without excessive buildup.

During periods of heavy shedding, we also recommend being especially gentle with the hair. Vigorous brushing, repeated high-heat styling, tight ponytails and aggressive chemical processing don't cause telogen effluvium, but unnecessary breakage can make already reduced density appear worse.

Camouflaging Sparse Areas While Hair Recovers

Temporary cosmetic products can also make a significant difference. Root powders, hair fibers and scalp-concealing products reduce the contrast between the scalp and hair, making sparse areas appear denser almost instantly.

One product we frequently reach for is Color Wow Root Cover Up. While it was designed primarily to camouflage regrowth between color appointments, the powder can also be applied strategically along a wider part or areas where the scalp is more visible. It doesn't treat hair loss—and that's an important distinction. It simply helps make the months between shedding and regrowth feel a little easier.

Volumizing shampoos, lightweight conditioners, mousses and root-lifting products can serve a similar purpose. For many clients, temporarily changing styling technique is enough to create noticeably fuller-looking hair while new growth catches up.

Most Importantly, Don't Panic Over Every Hair You See

One of the hardest things about telogen effluvium is that once you become aware of the shedding, it becomes difficult not to notice it. Every strand in the sink suddenly feels significant.

But remember what is happening biologically: in most cases, those follicles haven't disappeared. They were pushed prematurely into a resting phase and are shedding the old hairs as the cycle resets. Post-COVID telogen effluvium can be dramatic, but the available evidence continues to point toward the same reassuring conclusion: for most people, it is temporary and reversible. (aad.org)

If you had COVID—or another significant illness—a couple of months ago and suddenly feel as though you're losing far more hair than normal, there may be a very real explanation. And while your stylist can help you navigate the cosmetic side of that change, don't hesitate to bring a dermatologist into the conversation. Getting the right diagnosis is far more useful than guessing, buying a cabinet full of supplements or chasing products that promise overnight regrowth.

Your hair operates on its own timeline. Sometimes the healthiest thing you can do is understand that timeline, support your body while it recovers and give those follicles time to get back to work.

Research & Further Reading

American Academy of Dermatology. Can COVID-19 Cause Hair Loss? Updated August 2024. (aad.org)

Cleveland Clinic. How COVID-19 Might Be Causing Your Hair Loss. Shilpi Khetarpal, MD. (health.clevelandclinic.org)

Cleveland Clinic. Why Is My Hair Falling Out? Shilpi Khetarpal, MD. May 2026. (health.clevelandclinic.org)

Nguyen B, Tosti A. Alopecia in Patients With COVID-19: A Systematic Review and Meta-analysis. JAAD International. 2022. (pubmed.ncbi.nlm.nih.gov)

Hussain N, et al. A Systematic Review of Acute Telogen Effluvium, a Harrowing Post-COVID-19 Manifestation. Journal of Medical Virology. (pubmed.ncbi.nlm.nih.gov)

Jeon JJ, et al. Global Epidemiology of Telogen Effluvium After the COVID-19 Pandemic: A Systematic Review and Modeling Study. JAAD International. 2024. (pmc.ncbi.nlm.nih.gov)

Malkud S. Telogen Effluvium: A Review. Journal of Clinical and Diagnostic Research. 2015. (pmc.ncbi.nlm.nih.gov)

This article is intended for educational purposes and is not a substitute for medical diagnosis or treatment. If you're experiencing unexplained or persistent hair loss, talk with a physician or board-certified dermatologist.

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