Hair Loss: Causes, Treatments and When to See a Doctor

Hair loss is common enough that most people will notice some change in thickness or hairline over a lifetime, and yet it is still one of the topics people research quietly rather than raise with a doctor. This is a plain overview of what tends to cause it, what usually helps, and when it is worth getting a professional opinion rather than working through it alone.

The most common pattern is hereditary

Androgenetic hair loss, usually called male or female pattern hair loss, accounts for the majority of cases. In men it typically shows at the temples and crown; in women it more often appears as a widening part and general thinning across the top, with the frontal hairline preserved. It is gradual, it runs in families, and it is not a sign of illness.

Other causes worth ruling out

• Telogen effluvium. A sudden, diffuse shed a few months after a physical or emotional shock: illness, surgery, childbirth, rapid weight loss. It is usually temporary.
• Thyroid problems and iron deficiency. Both are common, both are detectable with a blood test, and both are treatable.
• Traction. Tight braids, extensions and repeated tension pull hair from the follicle. Caught early it reverses; left long enough it does not.
• Alopecia areata. Round, well-defined patches rather than general thinning. This is autoimmune and needs a clinician.

What actually helps

For pattern hair loss, the treatments with the strongest evidence are topical minoxidil and, for men, oral finasteride. Both work while you use them and stop working when you stop, which is worth knowing before starting. Neither restores hair that has been gone for years.

Nutrition matters, but only where there is a deficiency. Supplementing iron when your iron is normal does nothing for your hair. If you suspect a deficiency, test rather than guess. Our section on dietary supplements covers that ground.

Gentler handling helps at the margins: less heat, less tension, and a comb rather than aggressive brushing on wet hair. It will not reverse a hereditary pattern, but it stops you losing hair you did not have to lose.

When to see someone

Book an appointment if the shedding is sudden rather than gradual, if it comes in defined patches, if your scalp is sore, scaly or itchy, or if it arrives alongside fatigue, weight change or irregular periods. Those combinations point at something systemic that is worth identifying early.

This article is general information, not medical advice. Hair loss has many causes and the useful next step is usually a conversation with a doctor or dermatologist rather than a purchase.