Fine/thinning

Fine hair refers to strand diameter — each hair is narrower. Thinning hair refers to density — fewer strands per square inch. Many people experience both, and each responds best to a slightly different approach.

Common causes include genetics, hormonal shifts, stress, postpartum changes, thyroid issues, nutrient deficiencies (iron, vitamin D, biotin), certain medications, and harsh styling. See a dermatologist for persistent thinning to find the root cause.

It depends on the cause. Thinning from stress, postpartum changes, or nutrient deficiencies usually reverses once addressed. Genetic pattern thinning can be slowed with topical treatments like minoxidil, scalp serums, and prescription options.