Perimenopause hair loss: thinning, shedding and what to check

Thinning versus shedding

It helps to separate two different problems. Female pattern hair loss happens when hair follicles gradually shrink and produce finer, shorter hairs. It usually shows as a widening center part and thinning on the top of the head, with the front hairline largely spared. It is influenced by genetics and hormones, and the American Academy of Dermatology notes that it becomes more common after menopause.

Telogen effluvium is a sudden increase in shedding across the whole scalp. Normally a small share of hairs are in the resting phase, but a physical or emotional shock can push many more into rest at once. MedlinePlus notes that the shedding often appears weeks to months after the event and usually settles within a few months. Many women in perimenopause have both processes at once.

How hormones are involved

Estrogen helps keep hairs in their growing phase. As estrogen fluctuates and then falls, the relative influence of androgens on sensitive follicles increases, which can unmask or speed up pattern hair loss in women who are genetically prone to it. Stopping estrogen-containing birth control can also trigger a wave of shedding.

Signs that androgens may be unusually high, such as new coarse facial hair, adult acne or irregular cycles, are worth mentioning because they can point to conditions such as polycystic ovary syndrome.

Other causes to rule out

Before settling on a hormonal explanation, it is worth checking for:

• Iron deficiency, often from heavy perimenopausal periods
• Underactive or overactive thyroid
• Medications, including retinoids, beta-blockers, some antidepressants, blood thinners and some birth control pills
• Recent illness, high fever, surgery, major stress or rapid weight loss, including on weight-loss medications
• Low protein intake or very restrictive diets
• Alopecia areata, an autoimmune condition causing round bald patches
• Scalp conditions such as psoriasis, fungal infection or scarring forms of hair loss
• Tight hairstyles that pull on the hair over time

When to see a doctor promptly

Some features suggest a cause other than routine perimenopausal thinning:

• Round, smooth bald patches, or loss in the eyebrows or eyelashes
• A scalp that is red, scaly, painful, itchy or has shiny, scarred areas
• Hair loss with new coarse facial or body hair, acne, a deeper voice or irregular periods
• Rapid, heavy shedding with fatigue, weight gain or loss, cold intolerance or feeling unwell
• Hair loss that started soon after a new medication

What testing can help

Diagnosis usually starts with a history and a close look at the scalp and hair. Common blood tests include ferritin and a complete blood count to check iron stores, and thyroid function. Vitamin D, zinc or B12 are sometimes added. If signs of androgen excess are present, total testosterone and DHEA-S may be checked.

Estradiol and FSH do not diagnose the cause of hair loss. A dermatologist may examine the hair with a magnifying device, and occasionally a scalp biopsy is needed for patchy or scarring hair loss.

Treatment options in general terms

Treatment starts with correcting what you find, such as replacing iron or treating thyroid disease, and reviewing medications with the prescriber. Telogen effluvium usually improves on its own once the trigger has passed, though regrowth takes months to show.

For female pattern hair loss, topical minoxidil is the only FDA-approved medication for women. It needs to be used consistently for six to twelve months to judge results, and early shedding is common when starting. Prescription options such as spironolactone or other anti-androgen medicines may be added by a clinician; some are not suitable for women who could become pregnant. Low-level laser devices and platelet-rich plasma have some supporting evidence, and hair transplant is an option for some women.

Gentle hair care while you sort out the cause

Hair that is already thinning benefits from gentle handling. Avoid tight ponytails and braids, limit high heat from straighteners and dryers, and use a wide-toothed comb on wet hair. Make sure you are eating enough protein, especially if you are losing weight. Taking a photo of your part in the same light every month helps you judge progress more accurately than the mirror.

How HealifyMD can help

A HealifyMD clinician can review your hair changes alongside other perimenopause symptoms, order labs for iron, thyroid and other contributors, and discuss treatment options. HealifyMD offers a 4-in-1 Hair Loss Treatment ($199, one-time, confirmed at the eligibility review); it is a compounded medication, and compounded medications are not FDA-approved. Your clinician will check whether it suits you, including pregnancy considerations. Patchy, painful or scarring hair loss is referred to a dermatologist.