Hair loss is one of the most common concerns affecting both men and women. While losing 50 -100 hairs a day is considered a normal part of the hair growth cycle, excessive shedding or noticeable thinning may indicate an underlying condition that requires medical evaluation. Modern dermatology offers effective diagnostic tools and evidence-based treatments that can help slow hair loss, stimulate regrowth, and improve overall hair health.
Understanding the Hair Growth Cycle
Every hair follicle goes through a continuous cycle consisting of three main phases:
Anagen (Growth Phase): Lasts between 2–7 years and determines hair length.
Catagen (Transition Phase): A short phase lasting about 2–3 weeks where hair growth stops.
Telogen (Resting Phase): Lasts around 3 months before the hair naturally sheds and a new hair begins to grow.
Disruption of this cycle can result in increased hair shedding or permanent hair thinning.
Common Causes of Hair Loss
1. Androgenetic Alopecia (Pattern Hair Loss)The most common cause of hair loss in both men and women. It is influenced by genetics and hormones.
Signs include: Receding hairline in men
Thinning over the crown
Widening parting in women
Gradual reduction in hair density
2. Telogen Effluvium A temporary increase in hair shedding that usually occurs 2–3 months after a stressful event. Common triggers include: High fever or infections
Surgery
Childbirth
Emotional stress Crash dieting
Nutritional deficiencies
3. Alopecia Areata An autoimmune disorder where the immune system attacks hair follicles, resulting in sudden round patches of hair loss.
It may affect: Scalp Beard Eyebrows Eyelashes
4. Nutritional Deficiencies Healthy hair requires adequate nutrition.
Important nutrients include: Iron Vitamin D Vitamin B12 Zinc Protein Folate Deficiencies can contribute to diffuse hair thinning.
5. Hormonal Disorders Hormonal imbalances can significantly affect hair growth.
Common conditions include: Thyroid disorders Polycystic Ovary Syndrome (PCOS) Menopause Pregnancy and postpartum hormonal changes
6. Scalp Disorders Inflammation of the scalp may damage hair follicles.
Examples include: Dandruff (Seborrheic dermatitis) Psoriasis Fungal infections Lichen planopilaris Discoid lupus erythematosus
7. Medication-Induced Hair Loss Certain medications may trigger hair shedding, including: Chemotherapy drugs Blood thinners Retinoids Some antidepressants Beta-blockers Certain anticonvulsants
Symptoms That Should Not Be Ignored
Consult a dermatologist if you notice: Sudden excessive hair fall
Visible scalp through the hair
Receding hairline
Bald patches
Hair breakage
Persistent scalp itching or scaling
Hair loss associated with weight changes, fatigue, or irregular menstrual cycles
How Dermatologists Diagnose Hair Loss
A detailed evaluation helps identify the exact cause.
Assessment may include:
Medical history
Scalp examination
Hair pull test
Dermoscopy (Trichoscopy)
Blood investigations
Scalp biopsy (when necessary)
Correct diagnosis is essential because treatments differ depending on the underlying cause.
Evidence-Based Treatment Options
Treatment depends on the diagnosis, age, duration of hair loss, and overall health.
1. Topical Medications
2. Oral Medications
3. Platelet-Rich Plasma (PRP)
4. Microneedling
5. Low-Level Laser Therapy (LLLT)
6. Nutritional Supplementation
7. Hair Transplant Surgery
When Should You Visit a Dermatologist?
Early treatment offers the best chance of preserving existing hair.
Consult a dermatologist if you notice: Hair fall lasting more than 2–3 months
Progressive thinning
Bald patches
Scalp pain or itching
Hair loss associated with other medical symptoms
A personalised treatment plan based on the underlying diagnosis often produces better outcomes than trying multiple over-the-counter products.
Takeaway
Hair loss is a medical condition with many possible causes, ranging from genetics and hormonal changes to nutritional deficiencies and autoimmune diseases. Because treatments vary depending on the diagnosis, early consultation with a qualified dermatologist is essential. With today's evidence-based therapies, many patients can successfully slow hair loss, improve hair density, and maintain healthier hair over time.
Supporting Scientific Articles
Fitzpatrick's Dermatology – Comprehensive reference on hair disorders and dermatologic diseases.
American Academy of Dermatology. "Hair Loss: Diagnosis and Treatment." A patient-friendly overview of causes and evidence-based treatments.
British Association of Dermatologists. Clinical information on androgenetic alopecia, alopecia areata, and scalp disorders.
European Academy of Dermatology and Venereology. Clinical guidance and educational resources on common hair disorders.
Gupta AK, Mays RR. Diagnosis and Treatment of Androgenetic Alopecia. Published in the Journal of the American Academy of Dermatology (JAAD). Reviews current evidence on medical management of pattern hair loss.
Rossi A, et al. Platelet-Rich Plasma for Androgenetic Alopecia: A Systematic Review. Summarizes evidence regarding PRP therapy in hair restoration.
Adil A, Godwin M. The Effectiveness of Treatments for Androgenetic Alopecia: A Systematic Review and Meta-analysis. Journal of the American Academy of Dermatology.
National Institute for Health and Care Excellence. Evidence summaries on alopecia, nutritional deficiencies, and associated medical conditions.
These resources are widely recognized in dermatology and provide reliable, evidence-based information for both clinicians and patients.