Hormonal changes can affect the hair cycle, but not every period of shedding has the same cause. Pregnancy, the months after childbirth, menopause, thyroid conditions, and some medications can all be part of the picture. Because hair loss has many possible causes, the most useful first step is noticing the pattern rather than trying to diagnose yourself.

Postpartum shedding

Many new mothers notice increased shedding a few months after giving birth. The American Academy of Dermatology explains that falling estrogen levels can trigger temporary excessive shedding called telogen effluvium. It often peaks around four months after delivery, and many people regain their usual fullness by their child’s first birthday.

Gentle care can make the transition easier: avoid tight styles, limit excessive heat, and choose products that do not weigh the hair down. If fullness has not returned after a year—or the shedding is accompanied by scalp symptoms or distinct patches—see a board-certified dermatologist.

Menopause and pattern hair loss

Hair can also become finer or less dense around menopause. Hormones may be one factor, but age, genetics, medications, nutrition, and medical conditions can contribute as well. Female-pattern hair loss often appears as gradual thinning over the top of the scalp or a widening part.

Thyroid conditions, medications, and other changes

Thyroid disease, stopping some birth-control pills, and other medical changes may be associated with shedding or thinning. Do not stop a prescribed medication because of hair concerns without speaking with the clinician who prescribed it.

When to talk with a professional

Make an appointment with a dermatologist or health care professional if hair loss is sudden, painful, patchy, worsening, or accompanied by other symptoms. A clinician may review your health history, examine your scalp, and order tests when appropriate. Supplements should not be used as a substitute for diagnosis; too much of some nutrients can worsen hair loss.

While you investigate the cause, keep styling gentle and avoid anything that pulls, burns, or irritates the scalp.

Sources

• American Academy of Dermatology: Hair Loss in New Moms
• MedlinePlus Genetics: Androgenetic Alopecia
• American Academy of Dermatology: Hair Loss Diagnosis and Treatment

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