Headache and hair loss occurring together can be unsettling, but these two symptoms often share a common underlying cause rather than representing entirely separate problems. From chronic stress and nutritional deficiencies to thyroid disorders and autoimmune conditions, a range of treatable factors can drive both symptoms simultaneously. This article explores the most common causes, the medical conditions linked to this symptom combination, when to seek NHS advice, how diagnosis is approached in the UK, and the treatment and self-management options available — helping you understand what steps to take next.

Common Causes of Headache and Hair Loss Occurring Together

Chronic stress, nutritional deficiencies (iron, vitamin D, B12, zinc), and certain medications are the most frequent shared causes of headache and hair loss occurring at the same time.

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Experiencing headache and hair loss at the same time can feel alarming, but in many cases both symptoms share a common underlying trigger rather than representing two entirely separate problems. Understanding why these symptoms may occur together is an important first step towards appropriate management.

One of the most frequently identified causes is chronic stress. Prolonged psychological or physical stress can trigger a condition called telogen effluvium, in which a large number of hair follicles prematurely enter the resting phase, leading to diffuse shedding. Simultaneously, stress is a well-established trigger for tension-type headaches and migraines, which explains why both symptoms often appear during periods of significant life pressure. Postpartum telogen effluvium is a particularly common and benign form of this condition: diffuse hair shedding typically begins two to four months after delivery and usually resolves without treatment over the following months.

Nutritional deficiencies are another common shared cause. Deficiencies in iron, vitamin D, vitamin B12, and zinc have all been associated with hair thinning and loss. These same deficiencies may also contribute to headaches, fatigue, and poor concentration, though the relationship between specific deficiencies and headache is not always direct and should be assessed clinically. Poor dietary intake, malabsorption conditions, or restrictive eating patterns may underlie both symptoms simultaneously. Crash diets and severely restrictive eating are recognised triggers for telogen effluvium and should be avoided.

Certain medications can also produce both side effects. Some blood pressure medicines, antidepressants, and anticoagulants list both headache and hair loss among their known adverse effects. If you have recently started a new medicine and noticed either symptom, discuss this with your GP or pharmacist — but do not stop any prescribed medicine without medical advice, as this can be harmful. It is also worth noting that frequent use of painkillers or triptans can itself cause medication overuse headache (sometimes called rebound headache): taking simple analgesics on more than 15 days per month, or triptans on more than 10 days per month, can perpetuate or worsen headaches over time. If you think this may apply to you, speak to your GP.

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It is important to note that in many individuals, headache and hair loss occurring together may simply be coincidental, and a thorough clinical assessment is needed to determine whether a meaningful connection exists. Further information is available from the NHS hair loss page and NHS headaches page.

Medical Conditions Linked to Both Symptoms

Thyroid disorders, iron-deficiency anaemia, lupus, PCOS, and coeliac disease are established medical conditions that can cause both headache and hair loss as part of their clinical picture.

Several recognised medical conditions can produce both headache and hair loss as part of their broader clinical picture. Identifying these conditions early is important, as both symptoms may serve as useful diagnostic clues.

Thyroid disorders — both hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid) — are among the most common conditions associated with this symptom combination. The thyroid gland regulates metabolism throughout the body, and when its function is disrupted, hair follicles can be affected, leading to diffuse thinning. Headaches are also frequently reported by individuals with thyroid dysfunction, particularly those with hypothyroidism. A lump or swelling at the front of the neck (goitre) may also be present and should prompt a GP review.

Systemic lupus erythematosus (SLE), an autoimmune condition, is another important cause. Hair loss is a recognised feature of lupus, occurring in a significant proportion of patients, and headaches — including migraines — are a well-documented neurological manifestation of the disease. Similarly, anaemia, particularly iron-deficiency anaemia, can cause both symptoms through reduced oxygen delivery to tissues including the scalp and brain (NICE CKS: Iron deficiency anaemia).

Polycystic ovary syndrome (PCOS) in women can cause androgenic hair thinning alongside hormonal headaches, particularly around the menstrual cycle; menstrual migraine should also be considered and assessed separately (NICE CKS: Polycystic ovary syndrome). Coeliac disease, through its impact on nutrient absorption, may also present with both symptoms; diagnosis requires specific blood tests (see Diagnosis section) and is guided by NICE NG20.

Giant cell arteritis (GCA) is an important and urgent cause of new-onset headache in people aged over 50, and must not be missed. It can also cause scalp tenderness, jaw pain on chewing (jaw claudication), and — if untreated — sudden visual loss. Anyone over 50 with a new, persistent headache, scalp tenderness, or jaw claudication should seek same-day medical assessment.

Tinea capitis (scalp ringworm), caused by a fungal infection, is a common cause of patchy hair loss in children and occasionally adults. It typically presents with scaly patches, broken hairs, and sometimes lymph node swelling in the neck. It requires antifungal treatment and should be assessed promptly in primary care.

Less commonly, conditions such as secondary syphilis or certain connective tissue disorders may be responsible; testing for syphilis should be guided by clinical risk assessment. It is worth emphasising that while these associations exist, the presence of both symptoms does not automatically indicate a serious underlying condition — many people experience them due to lifestyle factors alone. Nevertheless, a medical review is advisable to rule out treatable causes.

When to Seek Medical Advice from Your GP

See your GP if hair loss is sudden, patchy, or rapidly progressing, or if headaches are new or severe; seek same-day assessment if you are over 50 with new headache and scalp tenderness (possible giant cell arteritis).

Knowing when to seek medical advice is essential for ensuring that any significant underlying cause is identified and managed promptly. While occasional headaches and some degree of hair shedding are common and often benign, certain features should prompt a timely GP appointment.

You should contact your GP if:

• Hair loss is sudden, patchy, or progressing rapidly

• Headaches are new, severe, or significantly different from any you have experienced before

• Either symptom is accompanied by fatigue, unexplained weight changes, joint pain, or skin rashes

• You notice a lump or swelling at the front of the neck, which may suggest thyroid enlargement (goitre)

• Symptoms began shortly after starting a new medication

• Hair loss is accompanied by scalp tenderness, redness, scaling, or signs of scarring (a smooth, shiny scalp with loss of visible hair follicle openings requires prompt dermatology assessment)

• You are using painkillers or triptans very frequently and your headaches are not improving

• You are aged over 50 and have developed a new persistent headache, scalp tenderness, or jaw pain on chewing (possible giant cell arteritis — seek same-day assessment)

Seek urgent medical attention (call 999 or go to A&E) if a headache:

• Is the worst of your life or comes on suddenly like a thunderclap

• Is associated with fever, neck stiffness, sensitivity to light, a non-blanching rash, or confusion (possible meningitis or encephalitis)

• Is accompanied by new neurological symptoms such as weakness, speech difficulty, or visual disturbance

• Follows a head injury

• Occurs in pregnancy or in the weeks after delivery

• Occurs in someone who is immunosuppressed or has a known cancer

• Is associated with seizures or loss of consciousness

• Is a new severe headache in someone taking anticoagulants

These features may indicate a serious neurological emergency such as subarachnoid haemorrhage or meningitis and require immediate assessment, as outlined in NICE CG150 (Headaches in over 12s).

For most people, the combination of headache and hair loss will not represent an emergency, but it is still worth discussing with a GP rather than self-managing indefinitely. Early investigation can identify correctable causes such as nutritional deficiencies or thyroid dysfunction, both of which respond well to treatment. Your GP can also provide reassurance and, where appropriate, refer you to a specialist such as a dermatologist, neurologist, or endocrinologist.

Diagnosis and Tests Used in the UK

GPs typically request blood tests including FBC, thyroid function, ferritin, vitamin D, B12, inflammatory markers, and autoimmune screen; dermatology or neurology referral may follow depending on findings.

When you present to your GP with both headache and hair loss, they will typically begin with a thorough clinical history and physical examination. This includes asking about the onset, duration, and character of your headaches, the pattern and extent of hair loss, any associated symptoms, your medical history, family history, and current medications.

A range of blood tests is commonly requested to investigate potential underlying causes. These may include:

• Full blood count (FBC) — to check for anaemia

• Thyroid function tests (TFTs) — to assess thyroid hormone levels

• Serum ferritin and iron studies — iron deficiency is a common and treatable cause of hair loss (NICE CKS: Iron deficiency anaemia)

• Vitamin B12 and folate levels

• Vitamin D

• Inflammatory markers (ESR, CRP) — to screen for autoimmune or inflammatory conditions; ESR and CRP should be requested urgently on the same day if giant cell arteritis is suspected in a person aged over 50 (NICE CKS: Giant cell arteritis)

• Coeliac serology — tissue transglutaminase IgA (tTG-IgA) with total IgA (and endomysial antibodies if needed), as recommended by NICE NG20, if coeliac disease is suspected

• Autoimmune screen (including ANA) — if lupus or another connective tissue disorder is suspected

• Hormone profile — particularly in women where PCOS or hormonal imbalance is considered; this typically includes total testosterone and sex hormone-binding globulin (SHBG) to calculate the free androgen index, and may include prolactin and LH/FSH as guided by NICE CKS on PCOS

For hair loss specifically, your GP may refer you to a dermatologist, who can perform a scalp examination, dermoscopy, or in some cases a scalp biopsy to determine the type and cause of hair loss. Where tinea capitis is suspected, scalp mycology (microscopy and culture) should be performed before starting systemic antifungal treatment.

For persistent or complex headaches, a neurology referral may be arranged. It is important to note that routine brain imaging is not recommended for typical migraine or tension-type headache; imaging is guided by the red-flag criteria set out in NICE CG150. Where imaging is indicated, MRI is generally preferred over CT where available.

NICE guidelines on headache management (CG150) provide a framework for investigation and referral in primary care.

Treatment Options Available on the NHS

NHS treatment targets the underlying cause — oral iron for deficiency, levothyroxine or carbimazole for thyroid disorders, and NICE-recommended analgesia or preventive therapies for headache.

Treatment for headache and hair loss will depend entirely on the underlying cause identified through investigation. The NHS offers a range of evidence-based treatments for the most common conditions associated with these symptoms.

For iron-deficiency anaemia, oral iron supplementation is the standard first-line treatment, typically ferrous sulphate or ferrous fumarate. An alternate-day dosing schedule may improve tolerability and absorption in some individuals, as noted in NICE CKS guidance. Vitamin D and B12 deficiencies are similarly managed with supplementation, either orally or, in cases of malabsorption, via intramuscular injection. Correcting nutritional deficiencies often leads to gradual improvement in both hair growth and headache frequency over several months.

Thyroid disorders are managed with medication: levothyroxine for hypothyroidism, and carbimazole as the usual first-line treatment for hyperthyroidism. Propylthiouracil is generally reserved for use in the first trimester of pregnancy or where carbimazole is not tolerated. Both carbimazole and propylthiouracil carry a risk of agranulocytosis (a serious reduction in white blood cells): anyone taking these medicines who develops a fever, sore throat, or mouth ulcers should stop the medicine and seek urgent medical attention. Radioiodine therapy and surgery are also established treatment options for hyperthyroidism, discussed with a specialist. Treatment is overseen by an endocrinologist where necessary. Hair regrowth typically follows once thyroid levels are stabilised, though this can take six to twelve months.

For tension-type headaches and migraines, NICE-recommended treatments include simple analgesia (paracetamol, ibuprofen) for acute episodes. Triptans are recommended for acute migraine attacks. Preventive therapies recommended by NICE (CG150) include propranolol and topiramate as first-line options for migraine prevention. Important safety information regarding topiramate: topiramate must not be used for migraine prevention during pregnancy, and must not be used in women or girls of childbearing potential unless the conditions of the MHRA Pregnancy Prevention Programme are met, due to the risk of serious harm to an unborn baby. This includes using effective contraception throughout treatment. Patients should discuss this with their GP or specialist before starting topiramate. Amitriptyline is also commonly used in practice. Valproate is contraindicated for migraine prevention in women and girls of childbearing potential. Avoiding medication overuse is essential: frequent use of analgesics or triptans can perpetuate headache and should be discussed with a GP. For people with chronic or refractory migraine, NICE technology appraisals have approved CGRP monoclonal antibodies (such as erenumab, fremanezumab, and galcanezumab) and onabotulinumtoxinA (Botox) in eligible patients; referral to a specialist headache clinic is required to access these treatments.

Hair loss conditions such as alopecia areata are managed under specialist guidance and may be treated with topical or intralesional corticosteroids, and in some cases immunotherapy; availability varies. Telogen effluvium is typically self-limiting and resolves over several months once the underlying trigger is addressed. Androgenetic alopecia may be managed with topical minoxidil, which is generally purchased over the counter and is not routinely available on the NHS. Finasteride for male pattern hair loss is typically available privately rather than on the NHS. For autoimmune conditions such as lupus, treatment is managed by a rheumatologist and may include hydroxychloroquine, which has also been shown to reduce hair loss associated with the condition. Long-term hydroxychloroquine use requires baseline and periodic ophthalmic monitoring in line with local protocols, due to the risk of retinal toxicity.

If you experience a suspected side effect from any medicine, you can report it to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk or through the Yellow Card app. This applies to prescription medicines, over-the-counter products, and supplements.

Managing Symptoms and Supporting Recovery

A balanced diet, stress management techniques, a headache diary, and gentle hair care practices support recovery alongside medical treatment, with most causes improving over six to twelve months.

Alongside medical treatment, there are several evidence-informed lifestyle measures that can support recovery and help manage both headache and hair loss more effectively. Taking an active role in your own health can make a meaningful difference to outcomes.

Nutritional support is a cornerstone of self-management. Eating a balanced diet rich in iron (found in red meat, legumes, and leafy greens), protein, zinc, and B vitamins supports healthy hair follicle function. If dietary intake is limited, a GP or dietitian can advise on appropriate supplementation. It is important not to exceed recommended doses of supplements and to check for potential interactions with other medicines with a pharmacist or GP before starting them. Avoiding crash diets or severely restrictive eating patterns is important, as these are a recognised trigger for telogen effluvium.

Stress management is equally important, given the well-established role of chronic stress in both headache and hair loss. Techniques such as mindfulness-based stress reduction, cognitive behavioural therapy (CBT), regular physical activity, and adequate sleep have all been shown to reduce headache frequency and support hair regrowth over time. NHS Talking Therapies offers free access to psychological support for eligible individuals. Where hair loss is associated with hair-pulling behaviours (trichotillomania), referral to psychological therapies is recommended, as this is a recognised stress-related condition that responds to appropriate support.

For headaches specifically, keeping a headache diary — recording frequency, duration, triggers, and response to treatment — can be invaluable for both self-awareness and clinical management. Common triggers include dehydration, irregular sleep, caffeine withdrawal, and hormonal fluctuations. Be mindful of caffeine intake, as both excessive consumption and sudden withdrawal can trigger headaches. Avoid using painkillers or triptans too frequently, as this can lead to medication overuse headache (see earlier sections).

For hair loss, gentle hair care practices — avoiding excessive heat styling, tight hairstyles, and harsh chemical treatments — can help minimise further damage while the underlying cause is being addressed. Postpartum telogen effluvium commonly begins two to four months after delivery and typically resolves on its own over the following months without specific treatment. Recovery from other forms of hair loss can also be slow, often taking six to twelve months, so patience and consistent management are key.

Regular follow-up with your GP ensures that treatment is working and that any new symptoms are promptly assessed. Further self-care information is available from the NHS headaches page and NHS hair loss page.

Frequently Asked Questions