Causes of Excessive Hair Loss: 15 Common Reasons Explained

Hair is one of the most important signs of health and beauty. When hair starts falling excessively, the issue shifts from a minor concern to a real source of anxiety. Many people notice hair loss while brushing or showering but are unsure whether this is normal or a sign of a deeper problem.
In this article, we provide a comprehensive guide explaining the causes of excessive hair loss in a simple yet scientific way, highlighting common causes, hidden factors, and the most effective treatment and prevention methods.

What Is Hair Loss? And What Is the Normal Rate of Hair Shedding?

Hair goes through a natural growth cycle consisting of three stages: growth, resting, and shedding. It is normal to lose 50 to 100 hairs per day without this indicating a medical issue.

When Does Excessive Hair Loss Become a Problem?

Hair loss becomes concerning when shedding exceeds the normal rate, continues for a long period, or when noticeable thinning and bald patches appear on the scalp. At this point, identifying the cause of excessive hair loss becomes essential.

Causes of Excessive Hair Loss Common Reasons

1- Genetic Factors

Genetics is one of the most common explanations for excessive hair loss, especially in men, though women can also be affected. In this case, hair follicles are sensitive to androgens, leading to gradual weakening and hair loss over time.

2- Hormonal Changes

Hormones play a critical role in hair health. Thyroid disorders, pregnancy, childbirth, menopause, and elevated androgen levels can all be major causes of excessive hair loss.

3- Vitamin and Mineral Deficiencies

Nutritional deficiencies are among the leading causes of excessive hair loss, particularly iron, vitamin D, vitamin B12, zinc, and protein. Lack of these nutrients weakens hair follicles and disrupts the growth phase.

Excessive Hair Loss Due to Poor Nutrient Absorption

In many cases, the cause of excessive hair loss is not a lack of vitamins, but poor absorption by the body. Even with a healthy diet or supplements, digestive issues such as irritable bowel syndrome, gastritis, or intestinal disorders can reduce the absorption of iron, vitamin B12, and zinc.
As a result, insufficient nutrients reach the hair follicles, causing gradual weakening and increased shedding. This explains why excessive hair loss may persist despite proper nutrition-the real issue lies in absorption, not food quality alone.

Causes of Excessive Hair Loss Related to Lifestyle

1- Psychological Stress and Anxiety

Chronic stress is one of the hidden causes of excessive hair loss. Stress can push a large number of hair follicles into the shedding phase prematurely, a condition known as telogen effluvium.

2- Lack of Sleep

Irregular sleep disrupts cell regeneration and hormonal balance, making sleep deprivation a significant cause of excessive hair loss for many individuals.

3- Poor Nutrition and Crash Diets

Strict diets without adequate nutrient compensation are a major cause of excessive hair loss, especially in women, as hair loses its primary source of energy and protein.

Causes of Excessive Hair Loss Due to Daily Habits

1- Excessive Heat Styling

Overuse of flat irons and blow dryers damages the hair shaft and weakens roots, making heat styling a long-term cause of excessive hair loss.

2- Improper Hair Washing

Washing hair with very hot water or aggressively scrubbing the scalp weakens follicles and increases shedding.

3- Using Unsuitable Products

Shampoos or hair products that do not suit the hair type can irritate the scalp and become a direct cause of excessive hair loss.

Causes of Excessive Hair Loss in Women

1- Postpartum Hair Loss

After childbirth, estrogen levels drop suddenly, leading to excessive hair loss. This condition is usually temporary and resolves within a few months.

2- Polycystic Ovary Syndrome PCOS

PCOS causes hormonal imbalances that weaken hair and increase shedding, making it one of the most common causes of excessive hair loss in women.

Causes of Excessive Hair Loss in Men

1- Androgenetic Alopecia

Genetic baldness is the most common cause of excessive hair loss in men, typically starting at the hairline or crown.

2- Lifestyle Factors

Smoking, sleep deprivation, and chronic stress significantly increase excessive hair loss in men.

Causes of Excessive Hair Loss in Veiled Women

Limited scalp ventilation, tight hairstyles, and insufficient hair drying are common causes of excessive hair loss in veiled women, especially with sweating and the use of unsuitable fabrics under the veil.

Causes of Excessive Hair Loss in Children

In children, excessive hair loss may result from iron deficiency, fungal infections, or psychological stress. Hair loss at this age requires accurate medical diagnosis.

Comparison Table Causes of Excessive Hair Loss by Factor

Cause	Type of Hair Loss	Duration	Treatability
Genetic	Gradual	Long-term	Moderate
Vitamin Deficiency	Diffuse	Medium	High
Psychological Stress	Sudden	Short-term	High
Hormonal Imbalance	Continuous	Long-term	Moderate
Improper Hair Care	Progressive	Medium	High

Treatment Methods for Excessive Hair Loss

1- Nutritional Treatment

Regular protein intake
Increased consumption of leafy greens
Adequate daily water intake

2- Medical Treatments

Dietary supplements
Minoxidil
Mesotherapy sessions

3- Natural Remedies

Castor oil
Rosemary oil
Aloe vera gel

Ways to Prevent Excessive Hair Loss

Follow a suitable hair care routine
Reduce stress levels
Maintain good sleep habits
Choose gentle, scalp-friendly products

Conclusion

Ultimately, the cause of excessive hair loss is rarely a single factor. It is usually the result of a combination of genetics, hormonal changes, nutrition, and psychological health. The most effective treatment starts with identifying the real cause, followed by an integrated plan that combines proper nutrition, correct hair care, and medical treatment when necessary.

FAQ

What is the most common cause of excessive hair loss?

Genetic factors and vitamin deficiencies are among the most common causes.