Eyelashes can fall out for several reasons, and the most common ones are irritation or inflammation of the eyelids, medical conditions that affect hair growth, or physical stress on the lashes. Some lash shedding is normal, but noticeable thinning, patches, or clumps usually point to an underlying issue that needs attention.
A frequent cause is eyelid inflammation, known as blepharitis. This can happen when oil glands at the lash line become irritated or when bacteria or tiny mites affect the follicles. Skin conditions like dandruff or rosacea can make this more likely. In these cases, lashes may fall out more easily and grow back slowly.
Timing can offer clues. Sudden lash loss after illness, major stress, pregnancy, or starting a new medication may be temporary. Gradual or persistent loss can be linked to conditions such as thyroid disorders or autoimmune diseases, where the body interferes with normal hair growth.
Avoid rubbing your eyes, harsh makeup removal, or frequent lash extensions, as these can worsen shedding. Do not start supplements or treatments on your own. If lash loss continues, a dermatologist or ophthalmologist can help find the cause and guide safe treatment.