Thinning Eyebrows

The 6 Common Causes of Thinning Eyebrows

Eyebrows, the unsung heroes of facial expressions and one of the key elements of our aesthetic appeal can sometimes become thin or sparse. Understanding the reasons behind eyebrow thinning is the first step in addressing the issue. 

In this blog post, we'll delve into six common causes of thinning eyebrows. Whether it's a change in diet, hormonal fluctuations, or certain medical conditions, we'll provide you with insights to help protect and nurture your brows back to their luscious glory. 

Stay tuned as we unravel these causes and offer solutions.

Over-Tweezing or Plucking

Over-tweezing or plucking is one of the most common self-induced causes of eyebrow thinning. The eyebrow hair follicles are sensitive, and excessive tweezing or plucking can lead to damage, resulting in slower regrowth of hair or even permanent hair loss. 

It is important to remember that the hair removal process should be done carefully and moderately. If you've overplucked in the past, don't worry - patience, proper care and in some cases, professional help, can restore your brows to their fuller state.

Overuse of Makeup Products, Especially Waterproof Mascara

The overuse of makeup products, particularly waterproof mascara, can lead to eyebrow thinning. These types of mascara are often harder to remove, which requires more rubbing or tugging at the eyebrows, potentially causing hair loss. In addition, some makeup products may contain harsh chemicals that are not friendly to delicate hair follicles. 

It's vital to thoroughly remove makeup at the end of the day and give your brows a break from heavy makeup applications whenever possible. Opt for products that are specifically designed to be gentle on your eyebrows and aim to nourish and strengthen the hair.


Chronic stress is another significant factor that can contribute to thinning eyebrows. During periods of intense stress, the body produces higher levels of cortisol, a stress hormone that can disrupt the hair growth cycle. This disruption might cause the hair to remain in the shedding phase for a more extended period, leading to thinning or hair loss. 

Moreover, stress can lead to habits such as hair-pulling, further exacerbating the problem. It's crucial to manage stress through techniques like meditation, regular physical activity, or seeking professional help. Taking care of your mental health often has positive effects on your physical appearance, including the health of your brows.

Lack of Nutrition

Lack of nutrition can also lead to thinning eyebrows. Essential vitamins and minerals are crucial for maintaining healthy hair, and a deficiency in these nutrients can result in hair loss, including in the eyebrows. For instance, iron, biotin, and proteins are particularly vital for hair health. Iron helps red blood cells carry oxygen to your hair follicles, which is essential for promoting growth. 

Biotin assists in producing keratin, a type of protein that makes up your hair, skin, and nails. Protein itself is crucial as hair is primarily made up of it. Therefore, a balanced diet rich in these nutrients can promote healthier and fuller eyebrows. 

If you suspect a nutritional deficiency is causing your eyebrow thinning, it may be worth consulting a healthcare professional who can advise on dietary adjustments or supplements.

Hormonal Changes

Hormonal changes, such as those that occur during menopause, pregnancy, or due to thyroid disorders, can also lead to thinning eyebrows. Hormones play a significant role in the hair growth cycle, and any imbalance can disrupt this cycle and cause hair loss. For instance, the thyroid gland, which produces hormones that regulate the body's metabolic rate, can also affect the health of your hair. 

Hypothyroidism (an underactive thyroid) or hyperthyroidism (an overactive thyroid) can lead to thinning of the eyebrows. If you suspect that hormonal changes are causing your eyebrow thinning, it's recommended to seek medical advice. A healthcare professional can carry out tests to determine if a hormonal imbalance is a cause and suggest appropriate treatments or lifestyle changes to help manage the condition and promote healthier eyebrows.

Medical Conditions

Certain medical conditions, like alopecia areata and dermatitis, can also cause thinning eyebrows. Alopecia areata is an autoimmune disorder where the body's immune system attacks hair follicles, resulting in hair loss. This condition can affect any hair-bearing area of the body, including the eyebrows. Dermatitis, on the other hand, is a general term that describes inflammation of the skin that can lead to itching, redness, swelling, and sometimes hair loss. 

If you notice significant hair loss or changes in your eyebrows, it's crucial to consult with a healthcare provider to rule out any potential medical conditions. Early diagnosis and appropriate treatment can often help manage the symptoms and encourage healthier hair growth.


Generally speaking, thinning eyebrows occur when you don’t take good care of them - whether it's through over-plucking, using too much makeup, or becoming too stressed. Compounded with the normal hormonal fluctuations we all experience or mysterious medical conditions we develop, thinning brows can become a real issue. 

The key is in knowing the most common causes and taking proactive steps to prevent them. Use eyebrow products with caution, eat healthy and get adequate rest - these simple steps could make all the difference. With awareness and diligence, your gorgeous brows can be yours for life!

About Bondi Lash Lab

At Bondi Lash Lab, we offer products that help you achieve salon-like results at home. We work closely with Australia's best natural research labs to develop products backed by solid science and a focus on natural ingredients. We also deliver grooming services with professional results in the comfort of your own home. For more information, send an email to or fill out our contact form. 

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