What should you know about Vichy hair loss?

Hair may thin gradually, come out in noticeably larger amounts, or form distinct patches. Temporary shedding can follow illness, marked stress, weight change, hormonal shifts, or a recent change in hair care. Gradual recession or thinning at the crown can fit male pattern hair loss, while diffuse thinning can fit female pattern hair loss. Smooth round patches may occur with alopecia areata. Scalp scaling, broken hairs, or tenderness can point toward scalp ringworm, and repeated tight hairstyles can contribute to traction alopecia.

The name of a shampoo or supplement does not identify the cause. A clinician may examine the scalp, ask when shedding began, review medicines and health changes, and decide whether tests are appropriate.

Handle hair gently: loosen tight styles, avoid frequent high heat and harsh chemical processing, and use a mild shampoo suited to your scalp. Keep a simple record of when shedding started and whether it is diffuse or patchy. Take a clear photo of the parting or affected area at intervals so change is easier to judge. Do not start finasteride or another medicine without discussing suitability, possible effects, and pregnancy-related precautions with a qualified clinician.

For background, see [Hair Loss](/symptoms/hair-loss/) and [Finasteride Treatment](/treatments/hair-restoration/finasteride-therapy/).

Arrange a medical assessment for sudden patchy loss, rapidly worsening thinning, scalp pain, marked redness, pus, heavy scaling, or broken hairs. Seek prompt care if hair loss occurs with fever, facial swelling, or feeling seriously unwell. Earlier review can help when a treatable scalp condition or medication effect is possible.

Ask: Does the pattern suggest shedding, a scalp disorder, or inherited thinning? Could a recent illness, medicine, diet change, or hairstyle be contributing? Should the scalp be tested for infection or inflammation? Which treatments are appropriate for my age, sex, health history, and pregnancy plans?