Medical Questions · Hair Loss
Hair Loss — Questions Answered
What causes hair loss, how the common types differ, which treatments help, and when to see a doctor — answered in plain language.
What causes hair loss?
Hair loss has many causes, and more than one can act at once. The most common is hereditary pattern hair loss driven by genetics and hormones, but thyroid disorders, iron or vitamin deficiencies, stress, illness, certain medications, hormonal shifts such as after pregnancy or menopause, and scalp conditions can all play a role. Because the cause determines the treatment, identifying it is the first step.
What is male pattern baldness?
Male pattern baldness, or androgenetic alopecia, is the most common cause of hair loss in men. It is hereditary and linked to the hormone DHT, which gradually shrinks hair follicles. It typically shows up as a receding hairline and thinning at the crown, and tends to progress slowly over years.
What is female pattern hair loss?
Female pattern hair loss is the most common type of hair loss in women. Rather than a receding hairline, it usually appears as diffuse thinning across the top of the scalp and a widening part, while the frontal hairline is often preserved. Genetics and hormones both contribute, and it can become more noticeable after menopause.
What is alopecia areata?
Alopecia areata is an autoimmune condition in which the immune system attacks hair follicles, causing sudden, often round patches of hair loss on the scalp or body. It can come and go unpredictably, and because it differs from pattern hair loss, it should be evaluated by a dermatologist who can discuss treatment options.
Does PRP work for hair loss?
PRP (platelet-rich plasma) involves injecting a concentration of your own platelets into the scalp to stimulate follicles. The evidence is growing and many patients see improved density, though results vary and it generally requires a series of treatments plus maintenance. It works best for early or moderate thinning and is something to discuss with a qualified physician.
Can nutrition or vitamin deficiencies cause hair loss?
Yes. Low iron, vitamin D, certain B vitamins, and inadequate protein are recognized contributors to hair shedding, as are thyroid imbalances. A physician can order bloodwork to check for these, since correcting an underlying deficiency is often the most effective fix when one is present.
What scalp conditions can cause hair loss?
Conditions such as seborrheic dermatitis, scalp psoriasis, and fungal infections can inflame the scalp and disrupt healthy growth, while scarring alopecias can cause permanent loss if untreated. Persistent itching, flaking, redness, or tenderness alongside shedding is a reason to see a dermatologist promptly.
Is hair loss reversible?
It depends on the cause and how early it is addressed. Shedding from a temporary trigger such as stress, illness, or a deficiency often recovers once the trigger is resolved. Hereditary pattern hair loss is progressive but can frequently be slowed or improved with treatment, which is why early evaluation matters.
What treatments are available for hair loss?
Options range from topical and prescription medications to in-office treatments such as PRP and, for suitable candidates, hair transplantation — and treating any underlying medical cause is essential. The right approach depends on the type, extent, and cause of your hair loss, so a personalized plan from a specialist is the best path.
When should I see a doctor about hair loss?
See a doctor if your hair loss is sudden, patchy, or rapid; if it comes with scalp symptoms or other health changes; or if it is affecting your confidence. Earlier evaluation generally means more effective treatment, because many causes respond best before significant loss occurs.
This information is provided for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified, board-certified physician about your individual situation.