Eyelash shedding is a common occurrence, prompting questions about its normalcy. This natural process is part of the body’s renewal cycle. While the number of lashes shed can fluctuate due to various factors, it is generally a consistent biological function.
The Natural Lash Cycle
Eyelashes undergo a continuous growth cycle, similar to other body hair, involving three distinct phases. The anagen phase, or active growth, lasts approximately 30 to 45 days. During this time, the hair follicle is firmly attached to a blood supply, allowing for cell division and lash development. About 40% of upper lashes are typically in this phase, preventing all lashes from shedding simultaneously.
Following active growth, lashes enter the catagen phase, a short transitional stage lasting about two to three weeks. In this phase, the hair follicle shrinks and detaches from its blood supply, halting further growth. The lash maintains its length, preparing for the final stage.
The final stage is the telogen phase, a resting and shedding period that can last around 100 days. During this phase, the old lash rests before naturally falling out to make way for a new lash beginning its anagen phase in the same follicle. It is normal to shed between one and five natural eyelashes per day as part of this ongoing cycle.
Factors Influencing Shedding
Several internal elements can influence the rate at which eyelashes shed beyond their natural cycle. Hormonal changes, such as those during pregnancy, menopause, or due to thyroid issues, can disrupt the hair growth cycle and increase shedding. Stress levels and certain underlying health conditions, including alopecia, can also lead to increased lash loss. A balanced diet rich in essential vitamins and minerals is important, as nutritional deficiencies can affect lash health and growth.
External factors also play a role in lash shedding. Habits like vigorous eye rubbing or improper makeup removal can cause physical trauma and premature fallout. Using waterproof mascara or leaving makeup on overnight can weaken lashes and lead to breakage. Environmental conditions and seasonal changes, particularly in spring and autumn, can also lead to temporary increases in shedding due to fluctuations in humidity and temperature.
Recognizing Excessive Shedding
While shedding a few eyelashes daily is normal, indicators may suggest excessive shedding. These include noticeable thinning of the lash line, finding clumps of lashes, or shedding accompanied by irritation, redness, or itching around the eyes. If lash loss occurs on both eyelids, or with hair loss from the eyebrows or scalp, these symptoms warrant attention.
Consulting a healthcare professional or dermatologist is advisable if you observe a rapid increase in lash loss or if shedding is accompanied by other concerning symptoms. They can help determine if an underlying health condition, such as blepharitis or a thyroid disorder, is contributing to the increased shedding. Seeking professional advice ensures proper diagnosis and guidance for maintaining lash health.