Hair loss can be reversed, doctors say: what to know about ferritin, thyroid, menopause and more

Sudden hair loss can often be reversed when doctors diagnose the underlying cause and tailor treatment accordingly, according to GP Dr. Ellie Cannon. In her guidance drawn from patient questions, she highlights several common triggers: ferritin deficiency, thyroid disease, menopause in women, and pattern baldness. Each condition has specific tests and treatments that can help restore hair growth, and experts urge people not to shrug off noticeable shedding.

A key factor, she notes, is ferritin, the protein that stores iron in the body. When ferritin levels are low, hair growth can slow or stop. A ferritin blood test, usually ordered by a GP, can reveal whether iron stores are depleted. If ferritin is low, doctors typically recommend a daily iron supplement. Some multivitamins contain at least 14 mg of iron and may have a similar effect. Testing and treatment should be guided by a healthcare professional, as excessive iron can cause its own issues.

Thyroid disease is another recognized driver of hair loss. The thyroid gland helps regulate metabolism and hormone balance; when it underproduces certain hormones, hair shedding can occur. A blood test can identify thyroid issues, and if diagnosed, a GP may prescribe thyroxine to restore hormone balance and potentially curb hair loss. For women, menopause is one of the biggest triggers of sudden shedding. In some cases, doctors may consider a short course of oestrogen therapy to counteract the hair-loss effects associated with hormonal changes during the transition. For pattern baldness, which can affect both men and women and often targets the top and front of the scalp, two drugs are commonly used: finasteride and minoxidil. The NHS, however, only offers minoxidil to eligible patients, so some individuals may seek treatment through private clinics or pharmacies. It’s important to remember that hair shedding varies by person; many people lose between 50 and 100 hairs a day as part of normal cycling, and the rate can accelerate with age. In some cases, shedding may be temporary and linked to illness, stress, cancer treatment, or weight loss.

Beyond these specific conditions, the notes include general health questions seen in practice. When coughs persist after vaccination, doctors emphasize that a link to vaccines is highly unlikely. Since the Covid vaccination program began, there have been no studies connecting vaccines to chronic coughs. A persistent cough should still be evaluated by a GP, as rare cases can signal more serious conditions, such as lung cancer. More commonly, coughs arise from asthma or chronic obstructive pulmonary disease (COPD), or from bronchiectasis that can develop later in life. A GP can perform breathing tests and order chest imaging to investigate these issues. Allergies and acid reflux (heartburn) are other frequent cough triggers. Heartburn may irritate the esophagus and provoke a cough for some people. Treatment can include prescription medications or over-the-counter remedies, along with lifestyle changes such as avoiding fatty foods, limiting alcohol and caffeine, quitting smoking, and managing meals to reduce reflux.

For those with high blood pressure, or hypertension, doctors note a wide range of medications are available on the NHS, including ACE inhibitors like ramipril and lisinopril, and ARBs such as candesartan and losartan. Each drug has its own benefits and potential side effects. While medication choices are essential, a natural, evidence-based approach also matters: a healthy diet, regular physical activity, weight management, and avoiding smoking and excessive alcohol can help control blood pressure. Stress management practices—such as yoga, walking, and talking therapies—can complement medical treatment and support overall heart health.

Sciatica, the nerve pain that travels from the lower back down the leg, is another topic readers ask about. In many cases, sciatica improves within a few weeks, but recurrence is common for some people. In most instances, conservative care suffices: targeted physiotherapy exercises and anti-inflammatory medications are effective for many patients. Surgery to decompress the nerve is rare and typically reserved for cases where conservative treatments fail or neurological symptoms worsen.

Separately, clinicians report an uptick in patients who feel depressed or anxious in response to ongoing global news. Well-structured support remains essential: patients should feel comfortable discussing mental health with their GP, and efforts like reducing exposure to distressing news, increasing physical activity, and maintaining social connections can help. While doctors do not typically prescribe antidepressants as a first-line response to media-related distress, they can offer practical steps and refer patients for further support if needed.

Readers who have questions for Dr. Ellie Cannon can email DrEllie@mailonsunday.co.uk. The publication notes that she cannot enter into personal correspondence, and replies should be considered in a general context to inform broader health guidance.