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Hair Loss due to thyroid hormonal imbalance  is very common and observed especially in women.Thyroid gland secrets important hormone which play a major role in hair growth. deficiency or overproduction of thyroid hormones can lead to dry and brittle hair and lead to hair loss especially seen in females. Thyroid illness can also be associated with menstrual irregularities and mimic female pattern thinning in many cases.

hair loss due to thyroid
Thyroid Gland

Thyroid is a gland present in the throat and releases T3 and T4 Thyroid hormones under the action of Thyroid Stimulating Hormones secreted by the pituitary gland. Thyroid illness may involve increased or decreased production of T3 and T4 hormones leading to hyperthyroidism. Thyroid hormones are vital metabolic hormones and play important role in skin and hair growth.Thyroid activity can be regulated by nutritional deficiencies, pregnancy,medication or any underlying health conditions.

What Happens in Hypothyroidism?

Hypothyroidism is underactive thyroid not secreting enough thyroid hormones and it can range from mild to moderate or severe problem. It is one of the commonest disorders come across by doctors all over the world.

The low levels of thyroid hormones decreases the activity and the ability of the body to repair and regenerate cells. In the developing world is a primary cause of hypothyroid is iodine insufficiency. Women are five times more prone to hypothyroidism and the incidence increases with the advancing age.

Underactive thyroid could also be due to Hashimoto’s disease which is caused by abnormal auto bodies, wherein white blood cells attack your thyroid cells. This is mostly a very slow progression, and frequently goes unrecognised for years. Many of the symptoms mimic due to aging and as result the condition often goes undetected. Therefore delay in seeking advice can lead to other health implications.

What are the symptoms of hypothyroidism or underactive thyroid?

  • Cardiovascular changes
  • Weight gain in the absence of dietary or exercise changes
  • Goiter or swelling in the thyroid area
  • Constipation
  • Cold Sensitivity
  • Depression and/or anxiety
  • Unexplained fatigue
  • Brittle nails with ridging may present
  • Hair Changes. The hair often  becomes frizzy, dry and brittle with hair loss and  signs of thinning, These symptoms are what brings many female patients in particular to seek the expert help of a Trichologist. Detailed history taking can yield further information about changes in body hair growth, for example eyebrows, pubic hair, leg and arms.
  • Raised Cholesterol
  • Muscle cramps
  • Memory loss and difficulty in concentration
  • Dry, rough and itchy skin
  • Menstrual problem


What happens in hyperthyroidism or overactive thyroid?

Overactive Thyroid or hyperthyroidism results due to over production of thyroid hormones T3 and T4.

A very large cases of all hyperthyroidism is caused by Graves’ disease – an autoimmune disease. In this disorder the thyroid cells are attacked by the immune system. Thyroid Stimulating Immunoglobulin TSI antibodies are produced and has no controlling factors and unlike TSH which is in sychrony with the levels of T3 and T4 in the blood, TSI causes and stimulates the thyroid to produce increased levels of T3 and T4 hormone.

Listed below are some of the main symptoms that could signal hyperthyroidism

  • Unexplained weight loss even though eating good
  • Fine tremors of hands
  • Dry eyes
  • Thyroid growths called Goiters
  • Enlarged protruding eyes
  • Difficulty in focusing and concentrating
  • Loose motions
  • Thinning hair and excess hair loss
  • Increase in sweating and heat sensitive
  • Heart palpitations
  • Sensitivity to light
  • Insomnia
  • Menstrual problems


If you feel you could be suffering from thyroid illness and have any of the three symptoms of either under or overactive thyroid, a timely help can save further implication on health and prevent further hair loss.

Another aspect of thyroid malfunctioning is the presence of toxic heavy metals such as lead, mercury, aluminium, arsenic and cadmium which can prevent vitamins and minerals required for thyroid functioning.

When considering hair loss related to thyroid inactivity, the key is to establish the cause. Hair loss treatment alone will not solve the problem. Hormonal or nutritional disturbances need to be address in the correct manner. For improvement in the hair growth a treatment protocol can be designed by your Trichologist that can help you regain lost hair and improve the texture of hair.


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