There are a number of factors that should be considered to cause constant eyelash loss. Firstly, there are certain irritants, such as the habit of using mascara or wearing false eyelashes, which can cause damage to the hair follicles at the eyelashes, resulting in repeated eyelash loss. Secondly, there are certain diseases that can cause baldness, such as pemphigus, which can cause not only hair loss, but also eyebrow loss and eyelash loss, and may be related to immune factors, such as autoimmune diseases, including dry syndrome, hyperthyroidism and vitiligo. It may also be related to neuropsychiatric factors, including excessive mental stress, anxiety, tension, insomnia, neurasthenia, etc. In addition, it is also considered to be related to nutritional metabolic disorders, such as anemia, protein deficiency, and cachexia.