Do eyelashes grow back? Yes they can and do with proper treatment.  There are numerous reasons why lashes fall out, stop growing, or change in texture. Many medical ailments and disorders can cause eyelashes to fall out or stop growing all together. Remember that a person’s eyelashes are a part of their faces, so it's natural to want lustrous, thick, full, dark lashes to frame the eyes. A person's physical appearance is very important. With this in mind, it's only natural to want to play up the best assets each person has, such as their eyes. There are several treatments and medicines available to promote eyelash growth. So don't worry. You can have the eyelashes you have always dreamed of having. Loss of eyelashes can be caused by an autoimmune disorder called alopecia aretrea. This disease is quite common and a dermatologist can give a patient shots of cortisone to prevent further damage to hair follicles on the eyelids.