Thyroid And Hair Loss

There’s no denying that hair loss negatively affects the quality of one’s life. It can be emotionally distressing and physically exacting. The imbalance of thyroid hormones is one of the many reasons why hair loss might occur.

This butterfly-shaped organ, located in front of the neck, is responsible for the production of the hormones triiodothyronine (T3) and thyroxine (T4). 

Together these regulate many functions of the body and ensure our normal, healthy growth.

However, an imbalance in the levels of these hormones affects the body in different ways. One symptom of the dysfunction of this organ is thyroid hair loss

In this guide, you’ll find out everything you need to know about thyroid and hair loss.

What Is Thyroid Disorder? 

To understand hair loss and thyroid, you need to know the role that the thyroid plays in the human body.

From regulating our basal metabolic rate, hair growth, body temperature, muscle contraction, neural development, reproduction, skin homeostasis, and even intelligence, the importance of thyroid hormones cannot be overestimated. 

It’s the imbalance in the thyroid hormones that results in:

  1. Hypothyroidism 
  2. Hyperthyroidism

According to Endotext, hyperthyroidism affects 5 out of every 1000 women while hypothyroidism, 3 out of every 1000.

Its incidence is greater among females. This condition is rather dangerous when it develops during pregnancy because it has been found to cause:

  • Premature birth
  • Death of the fetus 
  • Miscarriage 
  • Impairment of neuropsychological development 

Although iodine deficiency has been popularised as the reason for this disorder, there are many other factors such as pregnancy, age, gender, medications, genes, etc. 

Can Thyroid Cause Hair Loss?

Yes. An imbalance of thyroid hormones alone can stress the body, resulting in telogen effluvium. However, there are also other reasons why hair loss thyroid occurs. 

According to the British Thyroid Foundation (BTF), it is the severe, prolonged hypo- or hyperthyroidism that results in hair loss.

Also, this kind of hair loss is diffuse, which means that it will affect the entire scalp and not just a specific region.

Therefore, you’ll notice an overall thinning. BTF states that it isn’t common for people with mild, short-term symptoms of thyroid dysfunction to lose their hair.

Hypothyroidism Hair Loss 

The underproduction of thyroxine and triiodothyronine by the thyroid gland results in hypothyroidism. Initially, its symptoms might be barely noticeable. However, one might experience: 

  • Weight gain 
  • Fatigue 
  • Lethargy
  • Constipation
  • Decreased intellectual functioning
  • Weight gain

The most common cause for its development is Hashimoto’s disease, which is an autoimmune disease that damages the functioning of the thyroid gland.

The exact reasons for its development are still unknown, although it is believed that genetics might be involved. It is also thought that the presence of certain viruses or bacteria might be responsible. 

As iodine is responsible for the production of T3 and T4, its deficiency can also cause hypothyroidism.

Other than that, thyroid cancer, inflammation of the glands, and even taking certain medications can affect the production of these hormones. But are hypothyroidism and hair loss related?

Can Hypothyroidism Cause Hair Loss?

Hair loss is a symptom of hypothyroidism. Your hair can also become dry, rough and thin because of it.

A study published in the Archives of Dermatology reported that hypothyroidism resulted in an increase in the number of telogen hair.

This can happen due to telogen effluvium, which can be triggered by the hormonal imbalance caused by thyroid disorders. 

As a result, you might suddenly start shedding hair a few months after the onset of the disease. 

How To Stop Hair Loss Hypothyroidism?

To stop hair loss from hypothyroidism, it’s important to get treated for it. Fortunately, this kind of hair loss is temporary and your hair should start to grow back once the normal level of your hormones is restored. 

Treatment for hypothyroidism usually includes the intake of oral levothyroxine to make up for the low thyroid hormones. Since this condition is lifelong, you’ll have to take this medication every day. 

Hyperthyroidism Hair Loss 

The overproduction of hormones thyroxine and triiodothyronine results in hyperthyroidism. Its symptoms include: 

  • Weight gain
  • Sweating
  • Abnormal menstrual cycle
  • Nervousness 
  • Anxiety
  • Tremors
  • Fatigue
  • Upset bowel movement
  • Increased heartbeat
  • Swollen thyroid glands

As the production of hormones increases, the metabolic rate also rises. Furthermore, musculoskeletal, cardiovascular, and reproductive functions are negatively affected. 

A common reason for hyperthyroidism is Graves’ disease, which is also an autoimmune disorder.

In this, the cells of the thyroid gland start producing greater quantities of T3 and T4. Other reasons can be excessive intake of iodine, inflammation or infection of the thyroid gland (thyroiditis), and the development of thyroid nodules. 

It is also possible that treatment of one kind of thyroid disorder, such as hyperthyroidism, can cause the other one i.e. hypothyroidism.

Radioactive iodine is used to treat the former, which can lower the level of thyroid hormones to abnormal levels. 

Can Hyperthyroidism Cause Hair Loss?

Hyperthyroidism and hair loss are also linked to each other. The former can trigger the latter.

However, unlike hypothyroidism, this condition makes the hair quite soft and thin. Your hair might also feel more oily. 

Research shows that hyperthyroidism may affect the stem cells in the hair follicles. And that can lead to hair loss. 

Although, fortunately, this kind of hair loss is also reversible. 

How To Stop Hair Loss From Hyperthyroidism?

Hyperthyroidism hair loss can stop a few months after you start getting treatment for it. 

Treatment can include antithyroid medication (thionamides or iodides), which may be combined with beta-blockers to reduce the symptoms of hyperthyroidism.

Radioactive iodine treatment or surgical removal of the thyroid are other options for this condition. 

What Does Thyroid Hair Loss Look Like?

According to the American Association of Dermatology, losing 50-100 strands of hair is normal.

However, it is when you start noticing hair fall that’s more than usual, you have something to worry about. You might notice more strands of hair on the bedsheets, floor, in the hairbrush and drain.

You won’t develop any bald patches as a result of thyroid hair loss (although autoimmune conditions which result in thyroid disorder can leave you with bald patches, it’s not directly related to thyroid hair loss).

Also, keep in mind this kind of diffuse thyroid hair loss won’t only affect the scalp but also your eyelashes and eyebrows. 

Other than that, thyroid hair loss and an itchy scalp can also occur together with changes in hair texture (dry or soft).

Before And After Thyroid Hair Loss Pictures

Here are a few thyroid hair loss pictures before and after treatment:

Hyperthyroidism hair loss
Thyroid hair loss picture of female treated with thyroxine and zinc supplements
Thyroid hair loss
Hair loss due to levothyroxine overdose in an infant treated with readjustment of dose

Thyroid Hair Loss In Females

According to the Office on Women’s Health, thyroid disorders are more common in women than men.

And since hair remains symbolic of a woman’s femininity, thyroid hair loss can be very stressful.

It can affect the self-esteem of women and cause problems in their personal and professional lives. In fact, the stress of hair loss can cause even more hair loss.

Besides causing hair loss, thyroid disorders can cause serious health problems. So, if you notice anything unusual, get in touch with your doctor.

Types of Hair Occurring Due to Thyroid Disorder

Two types of hair loss can occur due to thyroid dysfunction. That means it can result in underactive thyroid hair loss and overactive thyroid hair loss. Let’s take a look at them: 

Telogen Effluvium 

Chronic telogen effluvium or diffuse hair loss is one way in which thyroid hair loss occurs.

Almost 70% of the hair will enter the telogen phase and fall out excessively from all over the scalp.

This can take almost two to three months to occur. The most common reason for diffuse hair loss is thyroid disease or iron deficiency, which is why their levels should be checked. 

It is caused by hormonal changes that cause shock-induced hair loss. It interferes with the normal hair growth cycle, causing the majority of the hair follicles to rest. 

Alopecia Areata 

In the case of autoimmune disorders, the body cells start attacking the hair follicles, which can cause alopecia areata.

It can be seen as a bald, circular patch on the scalp. It can also cause complete baldness. Both hyper and hypothyroidism can cause this. However, it commonly occurs in the latter. 

Can Thyroid Hair Loss Be Reversed?  

Fortunately, thyroid hair loss is not permanent. You have to start getting the treatment, though. A thyroid problem can exist for years without you knowing about it. So, you may be losing hair all the while.

Still, hair loss can be sudden or gradual. Once you start getting the treatment, your hair should start growing back in a matter of months.

In any case, you should consult a doctor. If this condition is left untreated for a long time, it can affect your joints, and heart, and even lead to obesity. 

Keep in mind that in rare cases it is also possible for the medications for thyroid problems to cause hair loss.

Since thyroid hair loss results due to telogen effluvium/stress on the body, this kind of hair loss occurs a few months later.

The timing may coincide with your treatment for the disorder. Here, it doesn’t mean that the medicine is causing hair loss. When taking medicine for your thyroid hair loss, talk to your doctor about its side effects. 

How To Take Care Of Thyroid Hair Loss?

Self-diagnosis is never the right answer when it comes to a serious illness. Many people believe that proper dietary intervention can eventually help them.

While it may be true in some cases, you need to know what’s causing your hair to fall out. Only then can any treatment work. 

To stop further thyroid hair loss, you first need to get treatment for the condition, which can include medications or surgery. In the meanwhile, you can do the following to better take care of your hair:

Eat Healthy Foods

You must eat wholesome foods to make sure that you do not suffer from any nutritional deficiency as you’re getting treatment for a thyroid problem. That’s because it can exacerbate your hair loss. 

In addition, you need to make sure that you’re not eating too many sweets or processed foods because they can cause inflammation, and worsen your health. 

If you’re eating foods rich in calcium or taking calcium supplements, you must space their consumption with the thyroid medication by 4 hours as it can affect their absorption. 

Also, if you’re thinking of taking vitamins for thyroid hair loss, don’t start them without consulting your doctor. They only help if you have a deficiency.

Be Gentle With Your Hair 

Since your hair will be quite frail as a result of the condition, you should treat it gently. That means avoiding the use of straighteners, curlers, blow dryers, and chemical dyes for at least a while. 

Also, when you’re brushing your hair, you should make sure that it has a wide-toothed comb so that your hair doesn’t get tangled in and pulled out of the roots easily.

Moreover, you should avoid any tight, complicated hairstyles that pull at your hair. 

Lastly, make sure to avoid very hot water baths. Use shampoos and conditioners that are nourishing and hydrating so that your hair doesn’t break that easily. 

Be Careful About Iodine

You must take note of your iodine intake. Kelp, in particular, is high in iodine and can cause hypo- or hyperthyroidism.

Iodine is also present in some supplements, so make sure that you read the ingredients before consuming them. If you’re taking any, make sure to talk with your doctor about it. 

Is Hair Transplantation Done For Thyroid Hair Loss?

That depends on the severity of the condition. Hair loss due to thyroid disease is mostly temporary, although you may experience some changes in the growth pattern, colour and even texture.

Mild cases of hyper or hypothyroidism do not require large-scale intervention like hair restoration surgery

However, you should discuss this with your dermatologist. Depending on the kind of hair loss you have and its severity, you may be recommended this surgery.

You will first have to get treated for the thyroid condition to get the surgery, though. To get an idea of the results, you should consider checking out our hair transplant Turkey before and after gallery.


If you are suffering from hypothyroid hair loss or hyperthyroidism hair loss, you should make sure to get in touch with your dermatologist.

It is possible to get these thyroid disorders treated. Mostly, hair loss results from stress, but an autoimmune condition can also cause alopecia areata. This kind of hair loss is usually reversible. 

Reviewed and Approved by Dr. Cagla Yuksel.

Open chat
Hello would you like a free e-consult?
Hello would you like a free treatment plan and a price quote?

Tap the icon at the right bottom to make an enquiry.