Medical Reasons Why My Hair Won’t Grow

Harman Kaur
Medically reviewed by
Dr. Kaushal

Review medical content on WOW Rx Pharmacy, so that accurate drug use information is easily accessible to everybody.
Dr. Akansha is a licensed Clinical Pharmacologist. She possesses remarkable knowledge in Pharmacovigilance, prescription analysis, drug information, and drug safety services. Additionally, she is a keen learner and an educator.

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hair fall

Understanding the factors hindering hair growth is crucial to maintaining healthy and luscious locks. 

While hair growth is natural, many individuals face challenges achieving their desired hair length for various medical reasons.  

This phenomenon has prompted significant interest among researchers and healthcare professionals to identify the underlying causes behind stunted hair growth. 

From hormonal imbalances and nutritional deficiencies to medical conditions and genetic predispositions, the complexities involved in hair growth are vast and multifaceted. 

This introductory exploration delves into medical reasons why my hair won’t grow.

Medical reasons that hair is not growing

There are several reasons which could be becoming a barrier to your hair growth.

Some of them are listed below, 

Thyroid problems

If you are a Thyroid patient, you are likely familiar with the various issues it can bring, including hair loss. 

Both severe and prolonged Hypothyroidism and Hyperthyroidism can impact your regular hair growth rate, slowing down or causing increased hair loss. 

The Thyroid condition arises when your thyroid gland fails to produce sufficient hormones or has excessive hormones.

You should immediately consult your doctor if you face any serious issues.


While age can be a significant factor in hair loss, not everyone will necessarily experience it as they grow older. 

The aging process can affect your hair by slowing its growth rate, potentially leading to grey or white hair and causing hair thinning. 

Additionally, as you age, your hair may become weaker due to the cumulative effects of wear and tear.

This can result from styling, bleaching, poor dietary habits, and overall physical health.

Nutritional deficiencies

Insufficient intake of vitamins and minerals can significantly impact your hair, causing issues such as limited hair growth and thinning. 

Essential nutrients like iron, protein, biotin, and zinc are crucial in maintaining healthy hair. 

When these vital nutrients are deficient, the risk of experiencing hair problems increases significantly.

Excess stress

how to regain hair loss from stressSource: Lucrecia_Laurel_from_corelens
A man who is in stress due to office work

Every day, we encounter various events that can induce stress. 

Beyond the well-known effects of headaches, fatigue, and sleep disturbances, stress also has the potential to impact the health of our hair. 

It can contribute to a condition known as ‘Telogen Effluvium,’ wherein the hair follicles enter a resting phase and stop producing new hair strands.

Consequently, this may lead to a significant increase in hair shedding, noticeable when combing or washing your hair.

Hormonal imbalance

Hair growth or loss in women can be attributed to an abrupt imbalance of male hormones called androgens, which naturally exist in females too. 

Hormonal irregularities, such as those related to thyroid issues, PCOS, menstruation, menopause, and pregnancy, can disrupt the hormonal balance and lead to significant hair loss.


Like age, your genetic makeup can also determine your hair growth. 

You can credit your genetics if you are fortunate to have inherited genes promoting long, healthy, and shiny hair without much effort. 

On the other hand, if you haven’t been bestowed with such favorable genes, you may be more susceptible to experiencing hair growth problems and thinning.

Split ends

Closeup of split endsSource: PBXStudio
Split ends

Severely damaged hair, split ends, and heat damage are irreversible once they occur. 

When it comes to split ends, the most effective approach to prevent further hair breakage is trimming them. 

Proper hair care is essential to avoid encountering split ends and breakage. 

Therefore, ladies must address these issues proactively, as doing so can enhance overall well-being and promote healthier hair.


It is important to consider any potential medical causes for these concerns if you notice that your hair development is slowed or that you are losing a lot of hair. 

Various dietary deficiencies, hormonal imbalances, underlying medical disorders, drugs, stress, and lifestyle choices can hamper hair growth. 

Finding the underlying cause and creating a specific plan to encourage hair growth and restore hair health can be done with the assistance of a healthcare practitioner or dermatologist. 

Treating these medical issues involves time, but with the appropriate strategy, you can stimulate hair growth and regain your luscious, vivid locks.

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Frequently Asked Questions

What is the medical reason for hair not growing?

Numerous medical conditions can impact hair growth, including alopecia, thyroid disorders, anemia, and Polycystic Ovary Syndrome (PCOS).

What disease is inability to grow hair?

Dermatologists use the term “Hypotrichosis” to describe a condition characterized by the absence of hair growth. Unlike alopecia, which refers to hair loss in areas where hair once existed, hypotrichosis pertains explicitly to a situation where there was no hair growth from the beginning.

Why won’t my hair grow more?

Similar to the influence of genetics, age is another factor that can affect hair growth. Throughout a lifetime, practices like heat styling, processing, bleaching, dyeing, and an inadequate diet can collectively weaken hair as you age.

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