Hello,
It can be due to alopecia totalis. In this there is hairfall of scalp as well as eyebrow and eyelashes. The cause is stress or some autoimmune disease. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.