Why does hair fall out?

Hair loss is a very common problem that significantly impacts self-confidence in both men and women, with numerous complex reasons ranging from genetic factors to environmental influences lying beneath it; while shedding an average of 50 to 100 hairs daily is considered normal, continuous loss exceeding this amount indicates that a specialist should be consulted. Correctly understanding the root cause of hair loss is the first step toward effective treatment, as the factor causing loss in one person (e.g., hormonal imbalance) may be completely different from the cause in another (e.g., vitamin deficiency). Early diagnosis and correct intervention make it possible to strengthen hair follicles and slow down shedding, which plays a critical role in restoring hair health.

The Most Common Hormonal and Genetic Causes of Hair Loss

A large majority of hair loss cases result from internal processes that develop beyond our control, and these factors usually require professional medical support. Genetic predisposition and hormonal changes, which are the primary factors, determine the type and speed of the shedding:

1- Androgenetic Alopecia (Genetic Hair Loss): This condition, commonly known as male pattern baldness, is the most frequent cause of hair loss in both men and women. The basic reason is the excessive sensitivity of hair follicles to the hormone Dihydrotestosterone (DHT), a derivative of the testosterone hormone. DHT gradually shrinks the hair follicles and shortens the hair's life cycle, resulting in new hair growth that is finer and weaker.
2- Hormonal Changes: Especially in women, an underactive or overactive thyroid gland, the postpartum period (Telogen Effluvium), and drops in estrogen levels during menopause severely disrupt the hair cycle and can lead to sudden shedding. A balanced hormonal structure is essential for healthy hair growth.
3- Stress and Shock Hair Loss (Telogen Effluvium): In people experiencing extreme physical or emotional stress (major surgery, sudden weight loss, or emotional trauma), hair follicles are observed to enter a resting phase (telogen) earlier than normal. This manifests as intense shedding that begins 2-4 months after the stressful event but is generally temporary.

The Role of Vitamin Deficiencies and External Factors

Environmental factors other than genetics, dietary mistakes, and deficiencies in the body are significant causes that accelerate and trigger hair loss. These factors can mostly be controlled through lifestyle changes:

1- Nutritional Deficiencies: Hair follicles are some of the fastest-dividing cells in the body and require constant nourishment for healthy growth. Deficiencies in Iron, Vitamin B12, Vitamin D, and Zinc are the most common nutritional deficiencies that weaken hair follicles and cause shedding. Iron deficiency anemia, in particular, is a leading cause of chronic hair loss observed in women.
2- Improper Hair Care and Procedures: Excessive heat applied to the hair, tying the hair too tightly (traction alopecia), harsh chemical procedures (dyeing, perms), and using low-quality shampoos directly wear down the hair strands and roots. Adopting a gentle care routine that allows the scalp to breathe is effective in reducing shedding.
3- Medical Conditions and Medications: Autoimmune diseases such as Lupus or alopecia areata (patchy hair loss) can cause shedding. Furthermore, certain blood pressure medications, blood thinners, and cancer treatments (chemotherapy) are also important factors that lead to hair loss.

It must be kept in mind that hair loss is a complex process, and a personalized approach is required for an effective solution. Consulting a dermatologist or a hair specialist to precisely determine the cause of the loss and begin the correct treatment is the safest and most effective way. / 2025-10-25 00:26:02