Before you grow back your eyelashes, you need to know why you lost them in the first place. If there is an infection or some other underlying disease or condition that has caused you to lose your eyelashes, it will need to be treated first. Your eyelashes will probably grow back on their own once the infection or condition is treated properly. Perhaps it would be helpful to visit a doctor to find out what the problem is.
There are a number of disorders and diseases that involve the loss of hair, sometimes on the scalp as well, but sometimes only the eyelashes. Alopecia is the medical term for hair loss, but this term covers all types of hair loss, whether genetic, due to medication, or disease or deficiencies. Some types of alopecia affect only certain areas of hair on the body. We do not have any clear idea of why alopecia occurs, but the condition seems to be a disorder of the immune system. If this is the case with you, then most likely your eyelashes will not be able to grow back. Sometimes however, eyelashes temporarily fall out due to stress, in which case you should just take it easy and they will grow back. Other possibilities include vitamin and mineral deficiencies, an infection of your eyelid or a reaction to the make up that you use. You may also be inadvertently pulling out your eyelashes when you apply or remove make up.
answered by M W