Hair loss in young men: Why thinning starts in late teens and twenties and what to do about it

New Delhi: Hair loss is often associated with ageing, but many men begin noticing thinning hair or a receding hairline in their late teens or twenties. For young men, this can affect confidence, body image and emotional well-being. While hair shedding is a normal part of the hair growth cycle, persistent or noticeable hair loss may indicate an underlying condition that requires attention.

Hair loss can have several causes, ranging from genetics and hormonal sensitivity to stress, nutritional deficiencies and medical conditions. Understanding what is causing the hair loss is an important first step towards choosing the right approach to treatment and hair care.

Understanding common causes of hair loss

Androgenetic alopecia

One of the most common causes of progressive hair thinning in men is androgenetic alopecia, commonly known as male pattern hair loss. It can begin in the late teenage years or early twenties and is influenced by genetics and sensitivity to dihydrotestosterone (DHT), a hormone derived from testosterone. In susceptible individuals, DHT contributes to the gradual miniaturisation of hair follicles. Over time, these follicles produce shorter and finer hairs, resulting in a receding hairline, thinning at the crown or both. A family history of hair loss may increase the likelihood of developing this condition, although its absence does not rule it out.

Stress

Stress is another factor that can disrupt the normal hair growth cycle. Significant physical or emotional stress, a severe illness, surgery, rapid weight loss or substantial dietary changes may trigger a condition called telogen effluvium. This causes more hairs than usual to enter the resting phase and subsequently shed. Hair shedding often becomes noticeable two to three months after the triggering event. Unlike male pattern hair loss, telogen effluvium commonly causes diffuse shedding across the scalp. It is often temporary, and hair growth may recover once the underlying trigger has been addressed.

Nutrition

Nutrition also plays an important role in hair growth. Inadequate protein intake and deficiencies in nutrients such as iron and zinc may contribute to hair loss in some individuals. Young men who follow restrictive diets, skip meals or experience rapid weight loss may be particularly vulnerable to inadequate nutrient intake. However, nutritional deficiencies are not the explanation for every case of hair loss. Supplements should be considered when a deficiency is identified or clinically suspected, rather than taken indiscriminately.

Medical conditions and scalp disorders

Certain medical conditions and scalp disorders can also affect hair growth. Thyroid disorders and other medical conditions may contribute to hair shedding, while scalp conditions such as fungal infections and inflammatory disorders may interfere with hair health. Sudden, well-defined bald patches may indicate alopecia areata, an autoimmune condition that affects hair follicles. Symptoms such as itching, redness, scaling, pain or broken hairs can indicate a scalp problem that requires medical assessment.

Hair care practices and lifestyle factors

Hair care practices and lifestyle factors may further influence hair health. Frequent chemical treatments, excessive heat styling and hairstyles that pull tightly on the hair can damage hair shafts or contribute to traction alopecia. Poor sleep, smoking and unbalanced diets may also affect overall health, although they should not automatically be considered the cause of hair loss. Identifying the actual cause is more useful than assuming that lifestyle changes alone will resolve the problem.

When should you seek medical advice?

While some hair shedding is normal, sudden, persistent or rapidly progressive hair loss should be evaluated by a qualified doctor or dermatologist. Medical advice is also important when hair loss is accompanied by scalp pain, redness, scaling or bald patches.

A clinician may examine the scalp, review family history, medications, recent illnesses and dietary habits, and recommend blood tests when indicated. This assessment can help identify the underlying cause and guide the choice of treatment.

Choosing the right approach to hair loss

The management of hair loss depends on its underlying cause. Male pattern hair loss may respond to evidence-based treatments such as topical minoxidil or prescription finasteride, following appropriate medical assessment. Both require realistic expectations, and potential adverse effects should be discussed with a healthcare professional.

When hair shedding is caused by nutritional deficiencies or an underlying illness, addressing that problem is essential. Maintaining a balanced diet with adequate protein, following gentle hair care practices and avoiding excessive tension or damaging treatments can also support hair health.

Starting an appropriate treatment early may help manage progressive hair loss. However, no single treatment works for everyone, and results can take several months to become noticeable. Identifying the cause and following a suitable treatment plan are therefore important for managing hair loss effectively.

Hair loss in young men can be associated with several factors, including genetics, hormonal sensitivity, stress, nutritional deficiencies and medical conditions. Since the causes can vary from one individual to another, understanding the underlying reason is essential to choosing an appropriate course of action.

Rather than relying on unverified remedies or self-prescribing treatments, young men should seek a medical assessment to identify the cause of their hair loss and develop a suitable plan. A timely and informed approach can help manage the condition while reducing unnecessary anxiety.

(By Dr Dokara Venkata Sai Tarun, MBBS, Consultant at Traya)

Disclaimer: This article is based on the research and inputs shared by the doctor mentioned above and is intended for informational purposes only. The findings should not be considered medical advice or used for self-diagnosis or treatment. Consult a qualified healthcare professional for personalised guidance.