Hair loss/hair fall during sleep. Eyebrow hair falls

Thank you for your question. Propecia is one of the treatments for male pattern balding (MPB). However, I can not tell if you have male pattern balding without more information and the opportunity to examine your scalp up close and in person. You may have male balding but you may have another diagnosis too. Male balding does not cause eyebrow and leg hair loss.  For anyone with hair on their pillow in the morning blood tests are appropriate. Thyroid tests are essential, but so are tests for hemoglobin, ferritin. Other blood tests may prove useful but what to order really depends on your medical history.

It is not clear that what you are describing is classic male patterned hair loss which will not impact your eyebrows. I would have to examine you.  We have a clinic in South Korea, Dr. Jino Kim and you might visit him there