what causes total loss of hair including eyebrows and eyelashes
1 Tumors both benign, and malignant tumors in the eyelids can have eyelash loss as a symptom. 2  Thyroid disorders â Can cause slower hair growth and loss of eyelashes. 3  Hyperthyroidism may cause hair to thin, break, shorten, and fall out in patches. 4  Eyelash loss is often an early sign of hyperthyroidism.
Both under-active and over-active thyroid conditions can cost you eyelash and eyebrow hair, though it is not a common symptom of the disorder. Trichotillomania causes an uncontrollable urge to pull out your own hair, including eyebrows and eyelashes.