Hello, I'm a trichologist with a background in hair and scalp health. It's a common concern among many to wonder if the act of combing or brushing hair can lead to hair loss. Let's delve into this topic with a bit more detail.

Hair Structure and Growth Cycle
Firstly, it's important to understand the basic structure of hair and its growth cycle. Hair grows from follicles in the scalp and goes through a cycle that includes a growth phase (anagen), a transitional phase (catagen), and a resting phase (telogen). At the end of the telogen phase, the hair falls out, and a new hair begins to grow in its place. This is a natural process known as shedding, where an average person can lose anywhere from 50 to 100 hairs a day.

Physical Stress and Hair Damage
Now, when it comes to the physical stress on hair, the American Hair Loss Association has noted that running a brush or comb through hair too hard can indeed cause damage. This is because the hair fiber, which is made up of a protein called keratin, can be weakened by excessive force. The outermost layer of the hair, known as the cuticle, can flake and strip away under such stress, leading to a condition known as trichorrhexis nodosa or "split ends."

Wet Hair and Its Vulnerability
When hair is wet, it's more vulnerable to damage. This is because the hair shaft swells, and the protective cuticle layer lifts, making the hair more susceptible to breakage. Aggressively brushing wet hair can lead to excessive pulling and breakage, which can mimic hair loss. However, it's important to note that this is not actual hair loss from the root but rather breakage along the hair shaft.

Traction Alopecia
Another condition to be aware of is traction alopecia, which is caused by constant tension on the hair. This can occur from tight hairstyles like ponytails, braids, or buns, but also from the repeated, forceful pulling action of a comb or brush. Over time, this tension can lead to hair thinning or hair loss in the areas where the tension is applied.

Brushing Technique and Tools
The way you brush or comb your hair can also make a difference. Using a wide-toothed comb or a brush with soft, rounded bristles can help minimize damage. It's also recommended to start from the ends of the hair and work your way up to the roots to avoid pulling on the hair.

Healthy Hair Care Practices
Maintaining a healthy hair care routine can help prevent hair damage and the appearance of hair loss. This includes:


1. Avoiding excessive heat styling: High temperatures can weaken the hair and cause it to break.

2. Using gentle hair products: Look for products that are free of sulfates and alcohols, which can dry out the hair and scalp.

3. Eating a balanced diet: A diet rich in vitamins and minerals, particularly those that support hair health like biotin, zinc, and iron, can contribute to stronger hair.

4. Staying hydrated: Drinking enough water can help keep the hair and scalp healthy.

5. Managing stress: Stress can contribute to hair loss, so finding ways to manage it can be beneficial.

In conclusion, while combing or brushing hair can cause some degree of hair breakage, especially when done aggressively or on wet hair, it is not typically the cause of significant hair loss from the root. However, adopting gentle hair care practices and being mindful of the techniques used during hair grooming can go a long way in preserving the health and integrity of your hair.

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Running a brush or comb too hard through your hair puts a lot of "physical stress on the hair fiber, and it can cause the cuticle to flake and strip away," the American Hair Loss Association says. Aggressively brushing while your hair is wet is a problematic, too, as it can lead to excessive pulling and breakage.Oct 11, 2014read more >>