Eyelash loss may not be the most common form of hair loss, but it can still be a pretty stressful problem. Eyelashes are defiantly considered a sign of beauty in most cultures, enough so that cosmetic companies have entire lines of eyelash products. Lashes are, as has been proven, big business.The thinning or loss of lashes can come as a result of many factors, including improper care, allergic reaction and illness. If the loss is minor, you may be able to discover the problem yourself. If the eyelash loss is severe or sudden, it may be best to contact your doctor.Allergies can sometimes cause eyelash loss. If your eyes are irritated as well as experiencing eyelash loss, it's time to stop using any beauty products on your eyes. This means forgoing mascara, eye shadow, eyeliner or any other cosmetic that may rub onto your eyelashes until the problem has been identified