Lyme disease and hair loss is a concern raised by many patients recovering from this tick-borne bacterial infection. Lyme disease, caused by Borrelia burgdorferi and transmitted through infected Ixodes tick bites, is recognised across the UK — with highest risk in rural, woodland, and moorland areas. Whilst hair loss is not a listed hallmark symptom in NICE or NHS guidance, significant physiological stress from serious infection can trigger temporary hair shedding. Understanding the likely mechanisms, how to distinguish Lyme-related hair loss from other causes, and when to seek medical advice is essential for anyone experiencing this distressing symptom during or after Lyme disease.

Can Lyme Disease Cause Hair Loss?

Lyme disease can indirectly cause hair loss via telogen effluvium — a temporary diffuse shedding triggered by physiological stress — typically occurring two to three months after infection, rather than as a direct bacterial effect on hair follicles.

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Lyme disease is a tick-borne bacterial infection caused by Borrelia burgdorferi, transmitted through the bite of infected Ixodes ticks. According to the UK Health Security Agency (UKHSA), ticks are present across the UK — including in some urban parks and gardens — though risk is highest in rural and woodland areas, particularly in Scotland, southern England, and parts of Wales.

The hallmark symptoms of Lyme disease include the characteristic expanding rash known as erythema migrans, fatigue, joint pain, and flu-like illness. Hair loss is not a recognised typical symptom of Lyme disease in UK guidance (NICE NG95; NHS Lyme disease). However, hair shedding is a well-recognised consequence of significant physiological stress on the body, and a serious infection such as Lyme disease can act as such a trigger. The most likely mechanism is telogen effluvium — a temporary, diffuse form of hair shedding that occurs when a large proportion of hair follicles are prematurely pushed into the resting (telogen) phase of the hair growth cycle, typically two to three months after a triggering event (British Association of Dermatologists; PCDS).

The systemic inflammation and immune response associated with Lyme disease may also play a theoretical role, though the evidence for a direct effect on hair follicles is limited. Some patients report hair thinning among ongoing symptoms after treatment for Lyme disease; however, this is largely anecdotal and is not well supported by robust clinical evidence. NICE guidance avoids implying that such symptoms reflect persistent active infection. Clinicians are advised to consider all possible contributing factors before attributing hair loss solely to Lyme disease.

Hair Loss During and After Antibiotic Treatment

Hair shedding during Lyme disease antibiotic treatment is most likely due to telogen effluvium from the original infection, not the antibiotics; doxycycline does not commonly list alopecia as a side effect in its MHRA-approved SmPC.

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The standard treatment for Lyme disease in the UK, as recommended by NICE guideline NG95, involves a course of oral antibiotics. For adults, doxycycline is the first-line choice (typically 21 days for erythema migrans); amoxicillin or azithromycin may be used as alternatives where doxycycline is not suitable. In more severe or disseminated cases, intravenous ceftriaxone may be required. Regimen choice and duration should follow NICE NG95 and BNF guidance, and patients should complete the full prescribed course — do not stop antibiotics without first consulting your prescriber.

Doxycycline is not commonly associated with hair loss; alopecia is not listed as a common side effect in its Summary of Product Characteristics (SmPC) as approved by the MHRA. Rare case reports of hair shedding exist, but the mechanism is uncertain and the evidence is very limited. Similarly, any proposed link between prolonged antibiotic use, gut microbiome changes, and impaired nutrient absorption affecting hair growth remains theoretical and low-certainty; patients should not assume this is occurring without clinical assessment.

Hair loss that begins or worsens during or shortly after antibiotic treatment should not automatically be attributed to the medication without proper evaluation. It is worth considering that:

• Telogen effluvium triggered by the original infection may simply be manifesting during the treatment period, given its typical two-to-three-month delay

• Nutritional deficiencies arising from illness-related appetite loss may be a contributing factor

• The psychological stress of receiving a Lyme disease diagnosis and undergoing treatment can itself act as a trigger for hair shedding

If you suspect a side effect from any antibiotic, you can report it via the MHRA Yellow Card Scheme (yellowcard.mhra.gov.uk). In most cases, hair shedding associated with illness or treatment is temporary and resolves as the body recovers.

Other Causes of Hair Loss to Rule Out

Before attributing hair loss to Lyme disease, clinicians should exclude thyroid dysfunction, iron deficiency anaemia, androgenetic alopecia, nutritional deficiencies, and medication-induced hair loss through targeted history, examination, and blood tests.

Before attributing hair loss to Lyme disease or its treatment, it is clinically important to exclude other common and treatable causes. Hair loss has a broad differential diagnosis, and a thorough assessment by a GP or dermatologist is essential to ensure the correct underlying cause is identified and managed appropriately (NICE CKS Alopecia; NHS Hair loss).

Common causes to consider include:

• Thyroid dysfunction — both hypothyroidism and hyperthyroidism can cause diffuse hair thinning; thyroid function tests (TFTs) are a routine first-line investigation

• Iron deficiency anaemia — one of the most frequent causes of hair loss, particularly in women; a full blood count (FBC) and serum ferritin level should be checked

• Alopecia areata — an autoimmune condition causing patchy hair loss, which may be exacerbated by immune dysregulation associated with infection

• Androgenetic alopecia — the most common form of hair loss overall, following a predictable pattern in both men and women

• Nutritional deficiencies — low levels of iron, zinc, vitamin D, or protein can impair hair growth; zinc and biotin testing should be reserved for cases where there is specific clinical suspicion, rather than as routine

• Hormonal changes — including those related to the menstrual cycle, pregnancy, or menopause

• Medication-induced hair loss — a range of medicines can cause hair shedding, including retinoids, antithyroid drugs, anticoagulants, antiepileptics, and beta-blockers; a full medication review is an important part of assessment

• Psychological stress and anxiety — frequently underestimated as a trigger for telogen effluvium

First-line investigations recommended in UK primary care (NICE CKS; PCDS) include FBC, serum ferritin, and TFTs. Further tests should be guided by clinical history and examination.

It is also important to be aware of red flags for scarring alopecia — including scalp redness, scaling, pustules, or pain and tenderness — which warrant prompt referral to dermatology, as scarring forms of hair loss can cause permanent follicle damage if not treated early.

Tick-borne co-infections such as anaplasmosis or babesiosis are extremely rare in the UK; they should only be considered if there is a relevant travel history or specific clinical features, and are unlikely to be a significant contributing factor for most patients.

When to Seek Medical Advice from Your GP

Seek same-day urgent care if you develop facial palsy, severe headache, or palpitations after Lyme disease; contact your GP promptly if hair loss is sudden, patchy, accompanied by systemic symptoms, or persists beyond six months.

Hair loss can be a sensitive and distressing symptom, and it is understandable that patients recovering from Lyme disease may feel uncertain about whether to raise it with their GP. In most cases, hair shedding associated with illness or infection is temporary. However, there are specific circumstances in which prompt medical review is warranted.

Seek urgent same-day medical attention or go to A&E if you develop any of the following, as these may indicate serious complications of Lyme disease (neuroborreliosis or Lyme carditis):

• Facial palsy (drooping of one or both sides of the face)

• Severe headache, neck stiffness, or sensitivity to light

• Radicular pain, numbness, or tingling in the limbs

• Palpitations, chest pain, or episodes of fainting or near-fainting

Contact your GP promptly if:

• You develop an expanding rash consistent with erythema migrans after a tick bite — this is a clinical diagnosis and antibiotic treatment should begin without waiting for blood test results, in line with NICE NG95

• Hair loss is sudden, severe, or rapidly progressive

• You notice patchy or asymmetrical hair loss, which may suggest alopecia areata or another localised condition

• Hair loss is accompanied by other new or worsening symptoms, such as fatigue, weight changes, palpitations, or skin changes, which could indicate an underlying thyroid or autoimmune condition

• You have not yet been formally assessed or treated for Lyme disease and are experiencing hair loss alongside other potential symptoms of infection

• Hair loss persists beyond six months without signs of improvement

• You notice scalp redness, scaling, pustules, or tenderness, which may indicate scarring alopecia requiring urgent dermatology referral

• You are experiencing significant psychological distress as a result of hair loss

Your GP can arrange appropriate blood tests — including FBC, ferritin, and TFTs as first-line investigations — to help identify or exclude contributing causes. If Lyme disease is suspected, serology testing (ELISA followed by immunoblot, per NICE NG95) should be requested; however, it is important to note that early Lyme serology can be negative, and if clinical suspicion remains, testing should be repeated after four to six weeks. Referral to a dermatologist may be appropriate if the diagnosis is unclear or hair loss is not responding to initial management. Suspected neuroborreliosis should be referred to neurology or infectious diseases; suspected Lyme carditis requires acute cardiology assessment.

Managing Hair Loss While Recovering from Lyme Disease

Telogen effluvium linked to Lyme disease typically resolves within six to twelve months; management focuses on correcting confirmed nutritional deficiencies, gentle hair care, and psychological support rather than routine hair loss treatments.

For most people, hair loss associated with Lyme disease or its treatment is a temporary condition that improves as the body recovers. Telogen effluvium typically resolves within six to twelve months once the underlying trigger has been addressed (BAD; PCDS; NHS Hair loss). The following practical steps can support hair regrowth and overall wellbeing during recovery.

Nutritional support is a cornerstone of hair health. Ensuring adequate intake of key nutrients — including iron, zinc, vitamin D, protein, and B vitamins — can help to optimise the conditions for follicle recovery. If blood tests reveal a specific deficiency, targeted supplementation under medical guidance is appropriate. Routine supplementation without a confirmed deficiency is not generally recommended, as excess intake of some nutrients (such as vitamin A or selenium) can paradoxically worsen hair loss. If you are taking supplements containing high-dose biotin, inform your GP before blood tests, as biotin can interfere with certain laboratory assays and produce misleading results.

Gentle hair care practices can help to minimise additional mechanical stress on fragile hair during the shedding phase:

• Avoid tight hairstyles, excessive heat styling, and harsh chemical treatments

• Use a mild shampoo and a wide-toothed comb

• Handle wet hair with particular care, as it is more susceptible to breakage

Regarding hair loss treatments: topical minoxidil is licensed in the UK for androgenetic alopecia and is not routinely required or recommended for telogen effluvium. If you are considering any hair loss treatment, discuss this with your GP or dermatologist before starting.

Psychological wellbeing should not be overlooked. Recovering from Lyme disease can be a prolonged and emotionally challenging process, and hair loss may compound feelings of anxiety or low mood. Support is available through your GP, a counsellor, or patient organisations such as Lyme Disease UK. Mindfulness, adequate sleep, and stress management techniques may also help to reduce the physiological stress burden on the body.

Monitoring progress with your GP and maintaining realistic expectations will support a positive recovery trajectory. If hair loss does not improve within six to twelve months, further specialist review is advisable.

Frequently Asked Questions